Peeing on a person is usually a sign of stress.
Maybe because you handled your snake more often and let him do whatever, he was more comfortable.
In order to keep a ball well...in a ball, you usually hold them tight or poke their heads(and they'll ball up on their own). And sometime balls stay in a ball because they're scared. It's a defensive mechanism. I'm not sure what your mom did to keep your snake in a ball, but it clearly was stressed from the actions.