and instilling fresh fear inland once again is that scary clown craze that swept across more than two dozen states. >> authorities say it's nothing to laugh about. here's the latest. >> reporter: a scary prank sweeping the nation, creepy clown sightings sending towns into a frenzy. for the first time ever, the topic of clowns brought up in a white house press briefing. >> you know, this is a situation that local law enforcement authorities take quite seriously. >> reporter: from california -- >> i've just been terrified ever since. i actually got trampled by a crowd yesterday because they were all running away in terror. >> reporter: to connecticut, police investigating social media threats promising clowns are coming to school to attack students. in texas, someone using the profile of tim slaughter and a scary clown face posting a list of schools he planned to visit

so far, 22 states reporting threats of clown violence and that's not all. >> all in black, black gloves on, had his hood up, and he had a silver mask on. it was, like, one of those evil looking clown ones. >> reporter: in oregon, a woman claims a man in a clown mask tried to attack her, and in michigan, a boy claiming a person dressed as a clown cut him with a knife. back in september, residents in south carolina recording someone in a clown costume tried to lure children into the woods. there's possibly been a dozen arrests base in connecticut, a school district is banning clown costumes and symbols of terror this halloween season. kendisand mara? >> thank you for the report. coming up, clearing up the confusion behind the chainsmokers. >> we're going to check in with one of the hottest music acts around and dig into the essence of the millennial music and what's behind the name? does it refer to pot? >> so we're pretty much like wow --

? that's one of their slower starts to one of the songs. they are great. they are held as one of the biggest pop stars in america right now, be many americans don't have any idea who they

>> i know the music now that we play it, but i had no idea it was them. they are not composed of women, although vocalists featured are women. if you're still confused, we're up all "nightline" with abc's nick watt. ? >> reporter: the chainsmokers, you may know them from the slightly irritating novelty 2014 break out hit. ? but first, let me take a selfie ? >> reporter: from a splashy billboard magazine article, you get th dreadful bros bragging about drinking, talking about the size of their manhood. if these guys are future of music, are we in trouble? >> reporter: meet the chainsmokers. you guys came across like real -- >> yeah. >> reporter: i wouldn't use the word. >> yeah. >> reporter: did they get you wrong or are you? >> parts that we do and don't like. i think we should have done a better job considering how hard we work on the music. >> we do 250 shows a year.

we had a show. tomorrow we're back in vegas. we got miami, austin, vegas again on friday, and them paris. >> reporter: they collaborate a lot. drew also sings, but do they actually play instruments? it's an old man question. >> we play all the instruments on our records, just like any band would. >> reporter: and they fuss with it on their laptops. >> play a bass guitar for the vibe, sound of a real bass, but i cut out the low end which is what a bass is for and add the suun low synthetic feeling and get the indistinguishable, just sounds like a super -- >> reporter: yeah. i have no idea what you're talking about, but it sounds great. >> okay, cool. >>reporter: the problem with having everything on a laptop, they can crash. they have lost a trove of songs. ? don't let me down ? >> "don't let me down" is one of the songs we lost. and i had to remake the song from scratch. ? having to like go back through

>> reporter: back to the song "selfie," 463 million youtube hits and counting. ? >> you made a decision, i'm done. i'm going to make what i want to make, what feels cool, i don't care if people can dance to it. i don't care -- i care, but, like, i just want to do what i like. and that was "roses." ? >> reporter: "roses" and the rest made them the biggest pop stars in america by being themselves, making music they like, long live the chainsmokers. i'm nick watt for "nightline" in west hollywood california. ? >> i love their music. >> i have learned so much from our show today. all songs i love and i thought they were women artists. no idea they were guys. >> absolutely fantastic, and they are young, and seem so humble.

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? time now for "this happened" spotlighting some of the more wild and whacky moments caught on camera that really did happen. >> yes, they did. we're starting this morning with this lady. let's go to her picture. that is irna, the prime minister of norway, a very important job. >> all right. running an entire country is pretty important, even if it is only the size of california with a population of roughly of brooklyn and queens, a lot of people. >> no disrespect. >> no disrespect. >> during a recent debate in parliament, she was caught doing this -- she's playing pokemon go. >> well, it's not the first time a norwegian politician was playing the game during parliament. >> what is going on there? >> the leader of the liberal party caught playing it during a

>> maybe that's what they should be debating, what to do about the craze. >> i'm thinking somebody put a lure there inside of parliament, and so everybody's, like, all right. >> this is a pokemon go thing. i have no clue what you're talking about. i'm a married mom with two little kids. anything pop culture, unless it's like von dutch hat, that's how far back i am. >> you need barbara billingsly to come on the plane and go -- >> who? >> i speak pokemon. >> i need help. next, a lesson we learned in kindergarten, take your turn. go one at a time. this i know kindergarten rules because i have a kindergartener. >> it's a life skill more essential on the highway. this is an example of two drivers in the philippines ruining it for everybody. they kept nudging side by side until they arrived at the toll booth, and then they apparently wedged themselves in between the curbs so that nobody else could

to eventually get involved. this is a game of chicken gone wrong. >> totally. >> yeah. they messed it up for everybody and traffic is screwed up thanks to those jerks. next the case of lost and found go pro. >> back in march of 2013, axel performed an amazing jump while skiing near yellowstone. national park in montana. if your name is axel, you have to do something on a snowboard in it was the cost of her go pro that she lost in the jump. >> three years late, she returned to the scene to try to retrieve the camera. and amazingly, after all those years of extreme weather, it still worked. >> this somehow makes sense to me. i feel like the freezing it, it would be freezing it, like, it would preserve it in time, you know, like the dna of the dinosaur or something. >> exactly. and the video was right there. all preserved. >> fantastic. all right. >> pretty cool. that's all for this half

now only on 13 action news...a long-time friend of victim is speaking out... police are warning people living in the anthem area to beef up their security after an increase in robberies! what police are also doing to help those people out... pause for 3 seconds of nats right now in the caribbean....massive flooding is turning streets into rivers hurricane matthew ripped through haiti...cuba and now is over the bahamas. the category 3 storn is headed directly for the u-s....it's expected to strengthen into a category four.. millions of americans are being told to prepare for the possiblity of a direct hit....and what could be the largest mass evacuation ever! soundbite(english) rick scott, florida governor: "get out now. it could be the decision between life and death." this morning a warning from florida's governor as one