He's go the weight of the exercise ball on his shoulders.
In This Picture: Photo of woman on exercise balls
A woman jumping on a trampoline with a bunch of balls
...but I enjoy watching it.
In This Picture: Photo of man with awesome set up
That Pug Has Some Balls
Take that, Miley!
Based on the looks of it, he's not breaking any rules.
But is it true?
A little to avant-garde for my tastes.
A dog with a terminator eye
Not everyone loves the ball pit