Have you ever been so scared that you literally peed your pants?
Humans don't have the market cornered on that behavior.
Our first ball is very mellow and doesn't mind being handled.
Our second ball is very timid and is slowly becoming comfortable with being handled. So far, she's peed on my daughter twice. The first time was when my daughter was walking with her and bouncing more than Little Miss was comfortable with. The second time was when we were helping her with a bad shed.
She may not be able to talk but she certainly can communicate when she has reached her limit.