7. It was a busy day at ER. Why are you people constantly trying to break your spine at the gym? Sure, this exercise activates ALL your muscles and it works on your balance, but you have to ask yourself: is it worth it? Also, will you need super balance once you fall on your head because you wanted to pimp your super balance. Lets be real here, people, Dont break your neck if you dont have to, especially when you are standing on a gigantic ball.