tonight on "nightline ", we have a winner. $640 million were up for grabs tonight, and, after a mega millions buying frenzy, it's confirmed. there is a winner. now what happens? high school high. it's the drug that reportedly sent demi moore to rehab. >> she's convulsing. >> but she is not the only one. an alarming spike in teens getting high on whip-it. how that combination of balloons and whipped cream can have deadly consequences. and in-flight video. does anyone like those treadmills? tonight, the latest wild viral trend, people posting videos of all the awful things that can

happen on their least favorite all the awful things that can happen on their least favorite exercise machine. captions paid for by abc, inc. good evening. i'm terry moran with a special west coast edition of "nightline." it's official. in the world record-breaking mega millions lottery there is a winner. the golden ticket came from a store in baltimore county, maryland, and there may be winners in other states. all day people lined up in a frenzy of last-minute buying, each with a strategy to win. so here's abc's ryan owens with the day in the life of a jackpot-crazed nation. >> reporter: tonight's mega millions jackpot is a world record 6$640 million. the nation held its breath tonight, waiting on those six

little numbers that add up to so many hopes and end up dashing so many millions of dreams. >> tonight's winning numbers are 46, 23, 38, 4, 2, and the gold winning ball is 3. >> reporter: with the biggest jackpot in history up for grabs, we spent the day crisscrossing the country to discover people's strategies to win it all. 6:00 a.m. in dallas, dawn of a dreamer's biggest day. this gas station is hopping, even as the longhorns who live right next door are just waking up. >> good luck. >> reporter: keisha lyons is wide awake and ready to win. >> i picked dates that are important to me. >> reporter: like? >> birthday, anniversary, date of divorce. >> reporter: 7:00 a.m. in new york's times square, lottery's closest thing to a lucky charm, yolanda vega. >> welcome to "good morning america's" lottery frenzy new

yorkers are going crazy. everywhere i go people are asking me for the winning numbers, asking to rub my arm for some luck. >> reporter: 10:00 a.m. in san lorenzo, california. kavanaugh liquor is the luckiest place in the state. it's sold four mega millions winners, more than any other store. >> i heard about the luck. >> reporter: the superstitious come from hours away, believing their best shot at $640 million is right here. >> i am feeling lucky. there's a lot of good mojo here. >> i drove 60 miles to get over here. >> reporter: by midday there's reason for optimism. a lottery official says there's a 95% chance someone will win tonight. experts say that's because so many numbers have been picked, every possible combination has likely been exhausted. >> it's like throwing darts at

the wall where everybody scribbled your name on there and they hit your name, you win. the more names are on there. >> reporter: at high noon, three costume makers are confident they stitched together the perfect office pool. >> i'm currently the keeper of the tickets. >> reporter: they bought more than $100 worth. they actually have a winning record. a few years ago this group won a grand total of $1 each. their co-workers weren't impressed. >> a couple of people weren't interested. that's okay. $500 million is so easy to split four ways. >> reporter: for that money, you could buy the hope diamond, a mere 350 million, or a million shares of apple stock or two of the world's most expensive yachts or you could purchase two william shatners. he's worth 300 million, although it's not clear why you'd want to. >> time for more lottery tickets. >> reporter: 1:00 p.m., newport

beach, california. dan vader is buying another 100 tickets to add to his free online lottery pool. he uses ad revenue from the site to buy the tickets. if he wins, he takes 10%. the 1600 other members of the site share the rest. all afternoon, from seattle to chica chicago, to atlanta, they eagerly handed over cash and bragged about what they'd do as america's newest half billionaire. >> i will retire and travel. >> i'd buy me a -- >> reporter: how did the jackpot get this big? ask marsha adams, the georgia woman is the last woman to win the mega millions. she took home a check for $72 million all the way back on january 24th. since then, there have been 18 drawings with no winners. each time the jackpot grew into what's now the largest in the

history of the world. 6:00 p.m. on the nevada/california border. people have been waiting in line for hours to buy tickets at this store. nevada, yes, the home of las vegas where you can bet on anything, does not allow the lottery. it's actually one of eight states where people are out of luck if they want to play mega millions. maybe they're better off since experts say the chance of winning is about 1 in 176 million. since nearly all of us are losers tonight, maybe these numbers will make us feel better. one statistician concluded, you are more likely to be possessed by the devil today than win the mega millions. in fact, the odds are better that lots of bad things might happen to you today, getting hit by an asteroid or being devoured by a flesh-eating bacteria. yes, someone really came up with those odds. 8:00 p.m., as darkness falls on that dallas gas station,

hundreds of latecomers poured in with just hours to spare. >> i played them. we'll see what happens. >> reporter: those longhorns next door are settling in for another night. their life won't be much different tomorrow, and, odds are, neither will yours. i'm ryan owens for "nightline" in dallas. >> but somebody's life is about to change drastically. late tonight, maryland's lottery director said, quote, we can't wait to greet the winner of this world record setting jackpot. up next, it was reportedly demi moore's cheap high. it's called whip-it, whipped cream canisters that can have deadly results. >> announcer: abc "nightline" brought to you by conoco philips. .

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>> announcer: "nightline" continues from new york city with terry moran. "nightline" continues from new york city with terry moran. when demi moore's recent

meltdown was splashed on tabloid pages this moshgs one of the most alarming details was the reported use of whip-it, laughing gas. turns out it's now the most-used inhalent in the country with roughly 500,000 new users each year, many of them teenagers. abc's brian ross has this story. >> this is the story of the unlikely combination of whipped cream, balloons, and getting high. but it's something well-known to a growing number of americans, including reportedly some famous ones. what they may not know is just how dangerous it can be. >> it's an emergency. >> ma'am, ma'am, ma'am -- >> reporter: hollywood celebrities can always be counted on to self-destruct in the trendiest of ways. >> is she breathing? >> is she breathing? yes. >> and she overdosed on -- >> she's convulsing. >> reporter: "she" was demi moore. when her friends called 911 two months ago, moore had smoked synthetic marijuana and reportedly used something else

that caused the deep concern. >> she's convulsing so we're holding her down. >> reporter: the something else was reportedly nitrous oxide gas, what's found in these tiny containers of whip-it, their stated legal use is to make whipped cream. in the human body, enough of the gas can deprive the brain of oxygen. >> they fall down. they have a lot of muscle spasm. they can be twitching, rolling around. it can go into a seizure. >> reporter: an estimated 12 million americans have used some form of whip-it. this amateur video was made outside a concert where hundreds of people were buying yellow balloons, they say, full of the gas. >> you can't hang out here. i'm calling the cops. >> this was an organized retail outlet for nitrous oxide. >> reporter: for some of the new breed of whip-it users, it's just a hoot. so unconcerned, they've posted

videos of themselves using it on youtube, complete with background music. these two young florida men used actual whipping cream cans from a store, telling abc news it was a one-time experiment. these are seen whipping it up in an office setting. but while nitrous oxide, also known as laughing gas, may seem hilarious or calming to its users, there are real mental and very serious physical risks. according to leading substance abuse experts. >> what you're concerned about is heart effects, affects on their nervous system, effects on their organ system. >> reporter: wall street lawyer debbie goldman knows that all too well. >> i started to think i had a problem when i woke up one morning and i couldn't walk. >> reporter: goldman says she started using whip-it's in college and law school and continued through her years at

one of the leading law firps to reduce the stress, she says. >> i liked the way it made me feel. i didn't feel like i was doing anything wrong. i could get it anywhere. >> reporter: going through ten boxes of the tiny containers every night, 24 to the box. you'd do 240 of those in a zmai. >> yeah. >> reporter: why so many? >> it was very relaxing. my neurologist told me i was very, very lucky that i didn't die from it. >> reporter: 18-year-old melissa of suburban phoenix was not so lucky. an aspiring fashion model and national honor society student in high school, she died after using whip-it's and some ecstasy pills just two weeks before her scheduled graduation. how do you go from planning a party for your kid, for graduation, to a funeral? >> reporter: her parents, mario and christy, and her sister alyssa, say they had never heard

of whip-its before melissa's death. >> what did we do wrong? why didn't we see this danger? >> one decision can change their lives and their family's lives forever. >> reporter: the sales of the whip-it seem to be booming on the internet. we bought boxloads online, no questions asked about age or what they'd be used for. if you see your son or daughter buying loads of whipped cream and they don't have a cake, you've got a problem. >> reporter: it's illegal in many places to sell the whip-its for human consumption, but it's a law rarely enforced. the people who run this smoke shop near the abc news offices claim to have no idea why their customers were buying so many whipped cream canisters. >> what are they for? >> for food. >> reporter: is this now a kitchen supply store? you know what these are for, don't you? >> no. >> reporter: the kids use them to get high.

you know that. but then the store manager said he would remove the remaining whip-its from the shelves so no one else could buy any. >> the danger is not just in the alcohol, it's not in the marijuana, it's not in the meds, in the cocaine. it's in your house. it's in a can of whipped cream. >> reporter: short of outlawing whipped cream or balloons, drug treatment experts say they're hoping to get the word out about the potential dangers of whip-its with the story of addiction, celebrity overdoses and the tragic deaths. terry? thanks, brian. great reporting there. coming up next, the exercise machines we love to hate. treadmills began as an instrument for punishment to many, they still are. what's the matter?

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well, there's one thing a lot of us struggle with, it's finding the motivation to get to the gym and jump on that treadmill. probably the most iconic piece of exercise equipment and perhaps the most loathed. but it turns out we love watching other people run on the treadmill. and fall off it. here's abc's david wright. >> reporter: remember that hugely popular video from the group okay go, where the band dances on treadmills? well, it turns out it's just as riveting to watch people who aren't quite so dext truss. there's a new viral video to prove it. the activity of running without actually going anywhere is absurd enough. but when the technology turns on us, takes us somewhere we never expected to go, it's funny.

it just is. >> big laugh and applause! >> reporter: a tv producer is an expert at this brand of humor. >> in a way, you're youtube before there was youtube. >> i think you're right. >> reporter: for the past 25 years he's made a very good living compiling clips like these and putting them on tv every sunday night. at afv, they get a lot of treadmill mishaps. >> there's nothing funnier than seeing your grandmother slip on a banana peel, you know? as long as she's safe. >> reporter: not just grandma. the treadmill shtick works just as well with serious cats and dopey dogs. one guy even performed a kind of treadmill experiment with a lowly shrimp. the animal kingdom is how treadmills got their start in the 19th century, as a way of harnessing horsepower or sheeppower. the europeans discovered they could be an effective form of

punishment. exercise as punishment for chubby hamsters or humans, nasa helped pioneer it. it's not as if the astronauts can throw open the hatch and run. they don't have to worry about the force of gravity like this guy. >> there's no glory going down on a piece of gym equipment. >> reporter: there was a riff about the indignity of faceplanting on a stair master. >> the guy on the stairmaster next to you would not stop his workout to help you up. oh, no, we got a problem in here! somebody in here, we have a problem. i can't stop. i just got started to on this machine. >> reporter: maybe he's just too busy filming. i'm david wright for "nightline" in los angeles. >> face-plant. thanks for watching abc news. we hope you check in for "good morning neshg." katie cork is