i'm sdrunk this is "nightline." >> tonight -- >> you should be showing up to work. >> fight night in the dpop. >> someone is convinced he's attacking me is going to help mill. >> the third debate full of surprising twists and attacks. >> this stuff is fantasy. >> hisoll numbers tanked. he's on the end. >> with former front-runner trump in a slump, would he go after the man who's now beating him in some polls? who won and who lost tonight? the high stakes in the highly unpredictable republican primary race. plus, professional pranksters. we're behind the scenes with the impractical jokers. the lifelong bestriends now a global cult phenomenon. carrying the secrets to their stunts and their success. how they turned their obsession -- >> who has three nipples but only uses one? >> -- into hit series with

guess who's coming to "black-ish." our own michael strahan making a cameo for a special halloween episode. we're there as he gets into character and clears up one pesky mor. >> a lot of people think you and i are the same people. enough pressure for you? >> i'm going to temucinex. >> too late, we're about to take off. >> it works fast in liquid gels. >> gels dissolve fast t release max strength medicine. let's end this. find your fall favorites. get an extra $10 when you spend $25 or more with coupon. save on door busters. guys and juniors arizona denim. womemen's boots. jcpenney. it when fits you feel it.

seconds. good evening. the left side unpredictae republican primary took another twist tonight. political watchers thought the third gop debate would be all about donald trump trying to regain his lead in the polls by attacking the surging dr. ben carson. but instead tonight the attacks came from surprising sources and were sometimes directed at surprising targets. donald trump, who has dominated this race for months, came into tonight's debate in boulder, colorado, trailing in some polls to dr. ben carson. t to the surprise ofany it wasn't carson with whom trump tangled but instead the normally genial goverr of ohio. >> folks, we got too wake up. we cannot ect somebody that doesn't know how to do the job. >> this is the man that was a managing general partner at lehman brothers when it went do the tubes and almost took everyy o of us with us including ben and myself. he was such a nice guy and he

said, i'm never going to attack. then his pollumbe tanked. that's why he's on the end. and he got nasty. so you know what? you can have him. >> it was classic trump. but the evening went on it was florida senator marco rubio, who has risen to third place in some recent polls, who seemed to be getting much of the attention. >> i thought the biggest moment in this, the most intense, jeb had to take a stand and confront marco rubio and he did it on missedvotes. >> a french work week, you get three days you have to sw up? you can campaign or just resign and let someone else take the job. >> marco rubio's response was stronger than jebs,e basically accused him of dog this for political purposes and simultaneously attacked the media. marco rubio came away much stronger than jeb did in that exchange. >> the only reason why you're doing it now is bause we're running for the same position and someone has convinced you attacking is going to help you. >> reporter: bush struggling in the polls, reducing his campaign payroll by 40%, and competing

with rubio for the position of strongest establishment candidate, has been hittingng his one-time mentee hard for not showing up for votes. in fact today bush's super pac launched a twitter account account @ismarcoworking and the first tweet was a ferris bueller gag. >> mr. rubio, mr. rubio, mr. rubio? bueller? >> reporter: at t one poin he was asked about an editorial out this morning from a homestate newspaper callg on him to resign for skipping votes in the senate while out running for president. >> when they say you act like you hate your job, doyou? >> i r read that editorial with great amusement. >> in 2008 barack obama missed 60% to 70% of his vote and the same newspaper endorsed him. this is anher example of the double standardd that exists between the mainstream media and the conservative media. >> reporter: it seemed the story was the fact that the front-runners, carson and trump, were making the least news. >> ben carson and donald trump seemed to disappear from the stage.

especially donald trump. he seemed to not really be much involved in the debate. and his answers sort of were the same things everything's heard before. so i think it'sing from where the folks that hold 50% of the vote basically disappeared from the stage. >> reporter: then carson dw applause with this diatribe against political correctness. >> they shouldn't automatically assume that because you believe marriage is between one man and one woman that you are a homophobe. and this is one of the myths that the left perpetrates on our societety. 's those people who are tryg to divide us who are the enemies. we need to make that very clear to everybody. >> reporter: going into this evening the cttering classes had assumed that the primary dynamic would be donald trump, who has dominated this rac for months, going after ben carson who's now starting to beat him in some polls. >> iowa, will you get your numbers up, please? i promise you i will do such a good job. by the way, carson is -- i don't

want the whole deal, i don't know what's going on. carson is lower energy than bush. >> reporter: on the stump trump has seemed to raise questions about carson's face. >> i mean, seventh day adventist i don't know about. >> reporter: carson did not appear to be worried about potential attack in the debate. >> any nerves at all? >> n yetet. >> maybe soon? >> maybe if a tiger comes out o the stage, maybe. >> reporter: apparently he was right not to be nervous. overall tonight trump was more kitten than tiger. >> i've created tens of thousands of jo. in all due respect, actually some of these folks i really like a lot, about i'm the only one that can say that. >> reporter: the most ardent attacks were on the moderators. >> daily fantasy sports has become a phenomenon in this country. >> reporter: who asked questions about such issues as fantasy football. >> we have $19 trillion in debt. we have people out of work.

we havisnd laiction aal qaeda attacking us. and we're talking about fantasy football? >> reporter: in the last debate, former hewlett-packard ceo carly fiorina made waves. >> if we will not stand up and force president obama to veto this bill, shame on us. >> reporter: tonight it may have been new jersey goverernor chri christie who showed the most spiciness. >> y want me to answer, or you want to answer? because i tell you the truth, even in new jersey what you're doing is called rude. >> reporter: on debate nights in america there's now a tradition of instant analysis, f from pundits of all varieties. hillary clinton herself weighed in tonight with a text. "so much talk, so little substance." who won and who lost tonight? >> the big loser was jeb. jeb had to have a stdout moment in the course of this and he didn't have any. matter of fact, i think he came away with more negatives than positive the big winner was probably marco rubio.

digital world seem to back that up. google says marco rubio was the top-searched candidate during the debate. coming up next online," they get paid to do this? how four friends turned a life long obsession with practical jokes into a cult hit. why is our michael strahan soliciting acting advice from the cast of "black-ish"? i sure had a lot on my mind when i got out of the hospital after a dvt blood clot. what about my family? my li'l buddy? and what if is happened again? i wagiven warfarin in the hospital but i wondered if this was the right treatment for r me. then my doctor told me about eliquis. eliquis treats dvt and pe blood clots and reduces the risk of them happening again. not only does eliquis treat dvt and pe blood clots but eliquis also had significantly less major bleeding than the standard treatment. knowing eliquis d d both... turned around my thinking. don't stop eliquis unless your doctor tells you to. eliquis can cause serious and in rare cases fatal bleeding.

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by many measures the guys you're about to meet are living the dream. they're getting paid handsomely to do what they love, which is pranpeople. tonight they tell abc's rebecca jarvis their number one piece of advice for those of usho wonder, how can i get paid to goof off? >> iet it, tomatoes, i know. >> reporter: this woman has no idea. >> i'll get thehole wheat pasta. >> reporter: that she is being pranked by a group of professionals. >> four, five -- look in your hood for god's sake, woman!

joe. sal. that's what it's all about >> reporter: murr. and q. >> want a bite? >> reporter: four best friends on a lifelonguest to embarrass each other. their hit show on trutv now celebrating 100 episodes of wild pranks. awkward epcounters. and questionable decisions. >> that was totally fine. >> i'm not going to put up with it. >> reporter: alln the name of comedy. >> that was good. not great. >> the joke's's on us, not on the public. >> one guy goes to the public, the others tell him what to do, if he fails he gets punished. >> the show is not about pranking anyone, it's not about pranking the public per se, it's messing with each other and the public's collateral damage. >> reporter: and it's working. the foursome all nearly 40 years

wildly popular withillions of fans all over the world. >> come on in. >> oh, thank you. all the way from scotland, yeah. >> we never thought when we created the show five years ago at ts point, we never thought families would watch it. we hear all the time three generations of family members are watching. grandparents, parents and kids. it's crazy. we never thought it would c catch on like that, it's really incredible. >> reporter: what's the secret to their hilarious success? the jokers inviting us in where no outside cameras have ever gone before. >> this is all the cameras we see, on the television monitor. >> reporter: joey knows what it's like to pull off priceless pranks. from the preparation -- >> that's a microphone to catch your mother sitting here. there's microphonenes under re in case they talk to us. >> this entire desk is made of chocolate. >> one big chocolate desk. >> we'll also say that this is the kind of bit where tre's a couple secrets planned tonight.

>> oh! >> i've got a cououple secrets -- >> what secrets are we talking about? >> things i'm going to do against my three best trends. >> youee thought of things you want to though at them? >> preplanned stuff. >> in advance. >> this room is going to mess with them. >> reporter: to the setup. >> joe oversees all editing. >> wow. with 16 cameras -- >> yeah. >> as somebody who does this time. >> it does. wrong camera angle, it could kill the joke or make the joke. >> totally. >> there's a song written about this whole process. 16 cameras >> reporter: and then -- >> here we go. >> repeporter: is game time. >> hell hi, how are you? >> today's challenge -- >> how are yo >> people think they're coming in for a focus group. instead of a real receptionist, they're greeted by -- you guessed it. >> hello. >> be a good receptionist. get and up go to the file cabinet and ask if he wants any. >> reporter: an impmpractical joker. >> do you want one? >> reporter: the jokers each

takeurns i in the middle of the action. >> you're here for an appointment? >> there's a rat on your desk! >> there's a rat, holy -- [ bleep ], [ bleep ]! >> oh, wait, it's just a power cord. >> oh, it's a power cord! >> it's one of those mtiti plex -- i feel sick. >> reporter: the three others watch and direct. >> what's your naname? >> brendan. >> princess. is is. >> reporter: if one refuses a a chalallenge - >> you're theype of guy who has three nipples but only uses one. >> reporter: be prepared for punishment. no matter what the cons consequence. >> i, james murray, takake you,

sal's sister, to be my lawfully wedded wife. >> how did you comep with this idea together? >> you know, we put wise to each other, we've been doing it all our lives. we wanted to put that forward for america to see. >> reporter: even when cameras aren't rolling the laughs keep coming. >> oh, g. it's running my show. reporter: it wasn't always lights, camera, a and jumping out of airplanes for the jokers. none ofou started in comedy? >> i did start out funny. no i worked -- have a degree in finance. i was a bartender doing comedy. >> i was a persol shopper at a baby store. >> ask him a question, anything, anything baby related. >> i was unemployed for so many years. i worked in tv development. developing tv shows. i wrote a book that never got published. it was a good book. then the guys and i met. >> did you just tell her what

>> no, i meant for it to be a career. it didn't pan out. >> you all are actual friends? >> yeah. >> we met 26 years ago in high school. >> one more guy. >> this is real, this is not concocted by some casting agent? >> we wish at this point we could get rid of each other but it's contractual. >> reporter: four friends laughing together always, making this big-kid act a grown-up success. >> what's your number one piece of advice to people who look at you? you lovehat you're doi, they want to that. >> don't give up. people say, where'd these guys come from? we've been straining for this 26 years. except if you're not funny, stop. do something else. you're not kidding anyone. >> reporter: for "nightline," i'm rebecca jarvis cracking jokes with the impractical jokers in new york. next, our michael strahan getting into the halloween spirit with a cameo on

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from "good morning america" to "live with kly and michael," michael strahan is no stranger to television. that said, when he got the

debut, the nerves set and fast. >> hey! >> whoa, whoa! >> don't you drop my apples! >> reporter: don't adjust your tv screens, that's me, michael strahan, guest starring on this week's episode of "black-ish." or should we call it "gap-ish"? >> i'm on the set of "black-ish," halloween episode, playing anthony anderson's cousin junebug. >> your real name! >> tea kettle! aahhh! >> everybody thinks anthony and i lk alike. wewe decidedo be on this episode to prove we are not the same person. i'm so excited. i am ready for my closeup. let me get io character. let's go. what's up? >> reporter: beforee start rolling some acting advice courtesy of my costars. >>'m glad i'm herendnd thank you fo having me because a lot of people think you and i are the same people. >> i'm going to show them something.

my gap has chosed. and his is wide. >> immensely. >> i think it's a compliment to me because i've been in the gym. so for them to confuse me with this? i'll take that any day. >> man men aret going to be happy with what i'm just saying. >> what are we looking forward to? >> you're going to be scary. >> yes? >> very strong. >> yes? keep going. >> very handsome. >> oh! >> there's a lot of acng. no! >> i was feeling good about myself until you said that. >> you play a mother to four kids. >> it's amazing. it's probably one of my favorite parts. working with anthony, the kids. >> kids everywhere. >> reporter: i got schooled by the nt-sized performers. >> kids. yeah. i am so nervs. what kind of advice do you have? help me calm down, please. >> oh, okay. if you like mess up on your lines, it's okay to mess up. because everybody messes up.

>> even he messes up? >> everyone messes up. >> i don't picture you messing up. do you ever laugh in the middle of the scene? >> oh, sometimes, especially working with anthony. because you know anthony's a goofy person. he likes to make faces when the camera's not on him. >> roof, roof, roof! >> i bite the side of my tongue, nod. >> mm! every time watch and i see you like this? >> yeah. >> i have to make it a little more subtle. >> so it's not like this. >> i'm on set, i've go to get back to work. check out "black-ish." >> michael, get your [ bleep ] back to work, man! come on! >> and "black-ish" airs wednesday nights at 9:30 eastern right here on abc. our thanks to michael strahan and our thanks to you for watching tonight. tune into gma first thing in the morning and wore an line 24/7 on our "nightline" facebook page

good night. "the insider" from hollywood, your 24/7 celebrity conversation. >> i'm very much a relationship oriented person, which makes us perfect for eachother. >> they call it quits. in halle's history of rocky romances. >> for the last two decades she's had four sflit smiths an three divorces. >> it was matterbreaking. i just couldn't understand why. >> and the alanis morissette you

ought to know.