This has the potential to go wrong in so many ways.
That's an interesting exercise...
Four guys holding exercise balls run into each other at full speed and one...
Sometimes working out can be dangerous.
People will try those damn exercise balls on everything...lol I don't think...
She's invented a new way to use the treadmill.
What the hell is he doing?
The only thing you'll get out of this workout is a sore neck.
A guy with muscles and brains is a rare find.
This chick is knocked out cold when they collide with exercise balls.