A yoga student of my mom's sent her this link about a game called Brainball which sounds like fun. From my quick scan of the article, two players wearing EEG headbands sit opposite each other at a special table with a steel ball on it, and the ball reacts to the electrical impulses transmitted by each respective player's brains (i.e. via the EEG headbands). The way the game works is that the ball always moves away from the more relaxed player of the two, so that the only way to send the ball back to your opponent and win is to become progressively more relaxed than they are. Cool, huh? Relaxation under pressure.