3. Segway Polo
As a certain ex-president proved, staying upright on a Segway is easier said than done - so imagine adding a heated game of polo to the mix! This kamikaze marriage of high tech transportation and the regal sport of polo is so popular it has its own world cup.
10. Robot Wrestling
Robot wrestling is equal parts nerdy and extreme. The game pits two robots against each other using moves closely resembling classic pro wrestling. May the toughest robot win!