If you’re not American:
A JumboTron is a large-screen television using technology developed by Sony, typically used in sports stadiums and concert venues to show close up shots of the event.
I bet any money that this guy was made fun of at school for being a loser a geek and a nerd, which he is. BUT it just goes to show that it doesn’t matter – he’s an absolute legend! Kids, if you get a hard time at school, don’t worry. All you’ve gotta do is come up with an insanely good dance routine, that holds just the right amount of both skill and stupidity. Then you’re set, you will be hailed as a hero all across the blogosphere.