disastrous rehearsal. >> music stopped in the middle. people weren't in their right spots, they didn't know what they were doing. >> reporter: last thursday, cameras rolling, it all came together flawlessly. student cameraman, rolling along in a teach were dragged along by a teacher holding an ipad. >> this is the most interesting thing i've done as a teacher at this point. >> reporter: the goal, raise $20,000 for children's hospital. avon high school united with one voice. david wright, abc news, los angeles. >> they nail that thing. >> there is no way my high school, a bunch of knuckle heads, would have been able to do anything like that. >> camera work was awesome. and being pulled in a chair. >> yes. it was uploaded on saturday, already 117,000 views. and i have a funny feeling they will get a whole lot more. >> you better believe it. >> for the cause. nice. coming up, a 1-year-old who can't form words but he sure can