Crazy party game

At the Super Bowl party I attended, one of the guests brought with him this game that I'd never heard of before.

It's called Lightning Reaction Extreme. Basically, four people hold a controller and watch the flashing red light on the console the controllers are connected to. When the light turns solid green, you must quickly hit the button. Whoever hits the button last (or too soon) gets an electric shock. Painfully entertaining party fun.