Ha, that's actually quite funny. I'm sure it will pass when he gets more comfortable. I had something similar with my ball. When he was a bit younger, I would hold him and he'd be just fine. I'd set him on my lap or something, at which point he figured it would be a perfect opportunity to release all of his bowel contents. I would get covered in poop, urine, and urates. Yay! *sarcasm* It was highly disgusting. He has not done it for a long time now though.