this is "nightline." tonight, the police officer in hot water, now resigning after being caught on camera using what some call excessive force against teenagers at a pool party. tonight, the investigation as the young man who filmed that viral video reveals how the summer celebration turned violent. >> it might have had something to do with racism. welcome to jurassic world. >> chris pratt opens up about his dramatic transformation from every man to action hero. the hotly anticipated summer blockbuster. her unlikely nomination for the 2016 presidential did the. >> chris pratt for president.

and don't try this at home. what would you do for a view. a daredevil revealing he actually has a fear of heights. but first, the "nightline" five. there's something out there. it's a highly contagious disease. it can be fay tat tal to infants. unfortunately, many people who spread it may not know they have it. it's called whooping cough. and the cdc recommends everyone including those around babies make sure their whooping cough vaccination is up to date. understand the danger your new grandchild faces. talk to your doctor or pharmacist and your family about getting a whooping

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officer forcibly pushing a black teenage girl has gone viral and sparked national outrage. many see it as the latest example of excessive force by police. now the white teenager who recorded the incident shares his story, and the news of the officer under investigation in this town divided. it happened in an instant. an end of the school year pool party erupts into screaming and shoving. the latest fuel over america's lingering fire over race injustice. the 15-year-old wearing the orange bikini thrown to the ground by the officer. the situation escalates as eric casebolt pulls out his service weapon and two unarmed teens quickly runaway. >> [ bleep ]! call my mama. >> and then it returns with the

girl in the bikini bathing suit, he pins her to the ground. this video went viral in hours, now seen by almost 10 million. and the outrage has come pouring in from the view. >> white kids, black kids no kids. nobody should be treated like that. nobody should be manhandled like that. >> to fox news. >> if you obey the police it doesn't usually happen. >> supporters of the police department voicing their feelings. >> i think he did what he thought he had to do to control the situation. >> what do we want? >> justice! >> while other members of the community marched in support of the teens, and at one point, both sides coming face to face over the issue. >> you're nothing more than a man with a badge. >> now the officer has resigned. >> our practice does not support his actions. he came into the call out of control. and, as the video shows was out

of control during the incident. >> the whole key is de-escalate situations. you, the police, don't want to become part of the problem. and that's what it appears to me happened in mckinney texas. the police actually became part of the problem. >> it all started last friday after members of a community pool contacted police about a rowdy crowd of students who they said weren't members and were refusing to leave. tensions flared witnesses say, after a fight broke out between white adults who had become agitated by the behavior of some of the black teenagers. it's unclear which were invited and which crashed the end of the school year party. it was then case bolt and other officers responded to the scene. >> i told you to stay! >> yet, as police rushed to disburse the crowd, case bolt can be seen rushing to the scene, so quickly he trips, flips and continues his charge. >> what did you do when i walked

away? >> the officer heard party-goers cursing. >> got this goddamn gear in the sun. >> then he focuses his attention on the girl. >> he told me to kept walking, and i kept walking, and i'm guessing he thought we were saying rude stuff to him of the and he shoved me in the grass started pulling the back of my braids. >> i just don't see in that scenario where the police were in harm's way or that the kids were harming anybody else. >> behind the camera 15-year-old brandon brooks capturing seven minutes of chaos on his phone. >> just putting random black kids on the ground. i was like one of the few caucasian people at the party. i think it might have had something to do with racism. >> but when the gun came out, broobs worried things were about to get worse. >> at that point, my heart did drop and i was scared that

someone was going to get shot and possibly killed. so i knew i had to keep on filming, like because i got really scared when he pulled out his gun. >> there's absolutely no rhine to ever pull a gun unless deadly force is about to be used on you. >> my colleague, steve osunsami spoke to members of the community. >> reporter: what do you think of all this? >> i think it could have been a lot worse than it was. thank god wasn't. the way he acted. this wasn't the first time. he has a demeanor about himself where he seems to be hot head. and thank god there was a camera. >> abc news has learned that in 2007 casebolt was accused in a federal lawsuits of racial profiling and excessive force during a drug search. albert brown junior who's african-american says case bolt and other officers slammed his

head against a car. they did find drugs and the case was dismissed. friday's incident set off a firestorm on social media like this. the officer has supporters as well. the situation in mckinney would not have escalated to what it did if everyone would have done what they were told to do by authorities read another tweet. tonight we hear from one of the teens that tried to help the young girl on the ground. >> he started manhandling her and you could hear people on the video screaming. and the way he had her i was like oh, my god he's hurting her. i was like officer, please stop. you're hurting her. >> the 18 year old says he lost his footing trying to help the girl on the ground that's why it looks like he lunged toward the officer. >> it being loose like i'm lunging toward the officer, but as you can see the incline, i slipped. >> at one point, adrian says he felt like he was looking down

the barrel of corporal casebolt's gun. >> i was thinking i'm about to get shot. is this it? and that's why i started running. >> adrian martin was arrested and charged with evading arrest and interfering with the police officer. adrian says casebolt was the only officer that was out of hand. >> there were some professional officers that were doing their job right. they were being respectful. but this one officer, he was taking it out of hand. he was real aggressive. >> and the mckinney police chief seems to agree. >> i had 12 officers on the scene. 11 of them did exactly what we would want them to do. >> and while watching the press conference about officer casebolt's resignation, adrian learns all the charges against him have been dropped. >> that case has been dropped. >> honestly i'm just really happy. i'm ready to move forward.

>> another flash point, what fallout may follow. next jurassic world, the franchise gets a modern makeover and that's not the only change you'll notice. new action hero chris pratt, opens up about the perks of becoming a sex symbol. if you have moderate to severe rheumatoid arthritis like me... and you're talking to a rheumatologist about a biologic this is humira. this is humira helping to relieve my pain and protect my joints from further damage. this is humira helping me reach for more. doctors have been prescribing humira for more than 10 years. humira works for many adults. it targets and helps to block a specific source of inflammation that contrubutes to ra symptoms. humira can lower your ability to fight infections, including tuberculosis. serious, sometimes fatal infections and cancers including lymphoma have happened, as have blood liver and nervous system problems, serious allergic reactions and new or worsening heart failure. before treatment get tested for tb. tell your doctor if you've been to areas

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summer blockbuster season is finally here. and excitement for "jurassic world" is heating up in part thanks to chris pratt, the actor now enjoying his new status as an action hero.

but abby boudreau found out he's kept a sense of humor about the fame and the fuss. >> stand there. >> reporter: there might be no one better suited right now to play an iconic summer action hero than chris pratt. when it's survival of the fittest on "jurassic world," pratt makes it look easy. you're a certificate final action hero. >> it's just now sinking in. >> reporter: well you know. >> thank you. >> reporter: his roles in hollywood, vast and transformative. >> i am in terrible shape. >> reporter: the once overweight funny man on parks and rec. now slimmed down and muscular. a guardian of the galaxy, even. this month those bulging biceps on the cover of ew. and the hollywood handsome on the cover of gq. omg. >> i'm more worried about how i look in this photo.

but i am concerned about the plane that's about to crash into his head. gq is an adjective that i've always tried to avoid. don't be all gq. but now i'm on gq and in gq. and you know what? i'm very interested. >> reporter: but at home the love of his life and mother to his 2-year-old son jack actress anna faris. to the fans he's a hollywood hunk with a heart. visiting sick children in the hospital. and his transformation was an emotional one. at his heaviest he weighed 300 pounds. >> the truth is at that time for me, and i'm not saying that all people who are overweight feel this way, and i'm not knocking people who are overweight. i was there, but for me personally i didn't feel good. >> reporter: he recently confessed to men's health magazine about his weight gain. i was impotent fatigued emotionally depressed. ly real health issues.

>> if i was joking around or pretending to be self-confident it was always slightly marred by this idea that i wish i look a little better naked. >> reporter: and it didn't help that your wife is a really good cook. >> you're right. she took joy in fattening me up a little bit i'm sure. but, i'm losing my mind right now. what's the question? i was fat, i was unhappy. and now i'm skinny, and i feel great. >> reporter: but talking about himself makes the humble super hero nervous. >> i'm starting to sweat. >> reporter: and just like notice film his co-star comes to his rescue requesting a quick touch-up. >> you're -- a little dab. >> what is happening! >> reporter: in "jurassic world," their characters try to stop the vicious rex from killing everything in its path. these characters are so tough they've been immortalized as

legos. you even have, you know -- >> i have an action figure. we both do. >> i hadn't seen this yet! i haven't seen this! look at that oh, she's so stern. >> she is. >> so stern. >> look at him. he's got a wry, swarty smile. >> reporter: they feel like the unlikeliest of heroes. >> it's very cool to get to play a character who in the beginning you think i think this person's going to get eaten. i have misguided individual. and then to end up in a place where they redeem themselves ultimately. >> reporter: "jurassic world" roars into theaters this friday. the latest in steven spielberg's blockbuster franchise, 22 years in the making or some might say

65 million years in the making. it takes us back to the island abandoned in 1993's jurassic park where those dinosaurs brought back to life go completely out of control. >> once in a generation maybe twice in a generation there's a movie that captures everybody, and it's a big event to see it in the theater. you remember where you were that weekend. >> reporter: and do you remember the first time you saw jurassic park? >> yeah. we saw it the same weekend. isn't that a cool thing? >> we saw it the same weekend. >> yeah, just kids. and we got to see dinosaurs. >> we got to see real dinosaurs, what would they look like? >> reporter: this "jurassic world" is now a fully fufrnsing theme park stocked with a t-rex and raptors. >> we pick up 22 years after the vaechbtsing in the original movie. >> reporter: even the raptors seem a bit whoho-hum.

>> he would never have lived in a world where dinosaurs were extinct. they're blase about it. that's why we need to capture them with a bigger faster version of a dinosaur. >> reporter: enter the indom tus rex, designed to be more terrifying than the t-rex. >> think it will scare the kids? >> this will be in parents' nightmares. >> reporter: she is one of those parents hoping her own son theo isn't too scared. >> do you think you'll let him see the movie? >> i'll let him see the movie. whether i'll let him see the movie now is something my husband and i will have to talk about. >> reporter: he has a cameo in the film. i >> i was a real wreck that day. >> reporter: the movie is predicted to premiere with $100 million at the box office this weekend. >> every day was a challenge, but i'm very very proud of the final product. >> reporter: leaving the gates of "jurassic world" open to talk

of another sequel. >> i'd jump at the chance to work with her again. you know she's a true leading lady. >> i have four words. >> reporter: okay. >> chris pratt for president. this guy is going to save us all. i'm telling you. best human being. >> reporter: i'm abbie boudreau for "nightline" in los angeles. and next, the view from above. why more young men are seeking thrills in dangerous stunts. for the sake of social media. abc news "nightline," brought to you by red lobster. i like my seafood like i like my vacations: tropical. and during red lobster's island escape, three new tropical dishes take me straight to the islands. so i'm diving fork-first into the lobster and shrimp in paradise, with panko-crusted lobster tail and jumbo shrimp in captain morgan barbecue glaze. or the ultimate island seafood feast, with tender crab wood-grilled lobster and two island-inspired flavors of jumbo shrimp.

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finally, tonight you're about to meet a man who just made history. what he does for a breathtaking view may just take your breath away. and he's just one of a group of growing urban explorers, but are they going too far and risking too much? he's on top of the world. well over 400 feet above it at least. today, daredevil james kingston became the first person to stand on top of london's famous wimbley arch. believe it or not, he was once afraid of heights. that fear is what sparked him to start cleeming often without any safety equipment. >> you can't afford to make any mistakes. >> he explained his death-defying drive in a documentary "don't look down". >> i guess in a way i am attracted to fear. it's just that mental challenge, that constant desire to get out of your comfort zone and become someone you didn't think you

could be. >> he is part of a growing number of urban thrill seeker scaling buildings and cranes all over the world, braving extreme heights to capture amazing views on camera. and those videos garnering millions of views on social media. it seems you'd have to be crazy to pull off these stunts but for an italian, the fan base and adrenaline rush are worth risking life and limb and stiles breaking the law. the duo scaled one of the world's greatest bridges. >> it's an adrenaline rush the feeling of absolute freedom. >> and when our cameras caught up with them, they were like kids in a candy store, snapping photos for their followers. this vertigo-inducing video, filmed with a pair of russian risk takers bypass security to scale china's tallest tower.

these shots from the top of dubai's princess tower b.a.s.e. jumpers, looking to outdo each other in pursuit of even greater heights. >> wow. what do you think? are adrenaline junkies like these risking too much? head to our night"nightline" facebook page and let us know what you think. it was nelson mandela who said that courage isn't the absence of fear but the triumph over it. as always we're online 24/7 at abc news.com. goodnight, america.

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