Reporter: We've set up shop on the midway at keansburg amusement park on the Jersey shore. Ladies and gentlemen, we have a contestant! Come on over here, sir. Reporter: And we've brought along our... See More
Reporter: We've set up shop on the midway at keansburg amusement park on the Jersey shore. Ladies and gentlemen, we have a contestant! Come on over here, sir. Reporter: And we've brought along our actor, Kevin, to test the limits of a classic carnival game. Ladies and gentlemen, it is time to play fooguthe-esser! Reporter: The rules are pretty simple. Let me guess your weight, let me guess your height. Let me guess your age. If I get it wrong you're going to win one of these fabulous prizes. Reporter: But what happens when Kevin goes too far? Oh my god, ladies and gentlemen, did I win the lottery? Reporter: And turns from harmless guesser -- I've dreamed of this! 20 years in the business, finally I get to guess your height! Reporter: To offensive bully? How'd you get down here? Did you drive down or did you ship yourself overnight in a matchbox? Reporter: Meet Sean, an actor who's dealt with a lifetime of teasing about his height. Come on, man, don't get mad. I don't want this guy to sue me ladies and gentlemen. I'd hate to end up in small claims court. Boom! Reporter: It's insulting. Degrading -- Oh, I'm on fire everybody! Reporter: Will anyone step in? How's it feel to be a bobble-head version of yourself? Are you serious? Reporter: What would you do? How about over here? How about over there? Sir, come on down here, let me guess your weight. Welcome, sir, what's your name? Sean. I can't guess your age because from behind you look like you're five so that makes it more difficult. What do you think? Can I pick you up? Can I lift you? Reporter: Throughout the day, there are all kinds of reactions to this public display of abuse. Hey, let me ask you a question, what is more difficult for you -- changing a light bulb or playing with a yo-yo? Reporter: Many folks watch from afar but they refuse to get involved. Hey, dude, this isn't cool. I don't got time. Come on. Follow the yellow brick road right back over here. Reporter: This man even seems to enjoy what he was seeing. What did you think of what he was doing? I thought he was just, you know, making jokes about the guy, and I thought it was funny. Reporter: But not everyone is laughing. Can you reach it? Jump! Jump! Oh, he got it everybody! He got it. Alright Sean, now pick your prize. What? No, I told him he could jump. I know but still, that's sort of like you're not telling other people to jump. Reporter: Time to tell Daniels oyiti he's on "What would you do?" What did you think of what you saw? I didn't know what to do 'cause like, he was just like, completely tormenting the guy. You could see the embarrassment. Wait, my mom's calling. Hello? John Quinones wants to talk to you. And he stepped up when someone was making fun of someone else because of their size. So you should be very proud of your son. You raised him right. Bye. All right, she's great. Reporter: We're at it again -- Step right up, step right up. Almost didn't see you there, sir. Reporter: And it doesn't take as long to guess what this woman would do. Where do you work? In a tree making cookies or in willy wonka's chocolate factory? Reporter: She jumps right in. Do you work here because you can't make it on comedy central? No, I work here because I have a talent. I'm very good. I'm just letting you know that the way you're insulting this man is not very funny. He's having a good time. Tell her, sir. He's going to beat the Out of you. You were upset. I had to voice my opinion. 'Cause you know what? I was picked on all my life as a kid. I had acne, I had glasses, I was unattractive. A lot of people don't say anything. No, they keep their mouths quiet and go along, but I'm boisterous now that I was picked on can't keep it inside. Reporter: But will others be able to keep it inside when we switch things up? People of New Jersey, your governor couldn't be here, but we got governor Christie's stand-in. Come on over here, let me guess your weight, big guy. Reporter: What will people do when Kevin begins bullying a 12-year-old about his weight? Hey, can we like, uh, 20 people, to help this guy get on to the scale? Reporter: Don't worry, nick is an actor and he's agreed to do this to shine a light on the abuse he faces every day. Hey, come on, let's roll you right up on the scale. Reporter: Our professional guesser may think he's being funny, but he's about to learn he guessed wrong. You seem like a good guy. Want to get up on the scale? No. Come on nick, get up on the scale. Hey everybody, let's cheer him on. Thick nick, thick nick. There you go. Whoa, that poor scale. Anyone got a guess out in the crowd? You're a jerk. Come on, I'm just doing my job, sir. Not very well. I think so I'm doing pretty well at guessing his weight. Not very well, you're just a jerk. Why don't you, you wanna guess your weight? No, I don't need anything, Look, he's having a good time. We're all having fun. No, I'm not. John, do you want to break this? Angelo. It's part of a show. We wanted to know who would speak up. What we're you thinking? I think it's abusive. Listen, I don't like anybody being abused. Nobody likes anybody being verbally abused. I mean, I think that's ridiculous. But if you are abusing somebody who really can't defend themselves you are just a nasty person. Reporter: And as the day goes on, it's not Kevin's act that turns more heads, it's nick's defenselessness. All right man, listen, listen, don't eat me. It's only a joke, we're just having a good time. Cut it out. Cut it out? He's going to win a prize. I'll give him a prize. Just apologize to him, man. You said some pretty horrible things. Apologize? What did I say that was so hurtful? Making fun of his weight. Do I owe him an apology? I believe you do. But don't you think it's funny? No, I don't. I don't think it's nice to call me names man. I'm just trying to do my job. Hey, buddy. Hey. It's part of a show, a TV show, called "What would you do?" Are you serious right now? Yes. How long were you going to stay here? Probably for a while.kr??6$ = I until either he walked away or s=zy??= <1kh??q right, everybody? Everybody is having a good time. Right? Everybody chant for nick. Thick nick, thick nick. You should be ashamed of yourself. Reporter: And now another mom, Marie livan, swoops in to help young nick. As a mother I am going to ask you. Can you just walk away from him? Excuse me! Like this. This is what he's doing for his life. That's the only way he knows how to, make people, belittle people in life. Walk away. That's my advice as a mother. Keep walking. I'm John Quinones. Yes, I know who you are. He just wouldn't quit. No, he wouldn't. I've done this before and I've been called names for saying "Don't butt in, don't butt in" and that's not the way the world works. That's why I love your show. Reporter: And that's why Marie gets the last word with the crowd.
This transcript has been automatically generated and may not be 100% accurate.