Maybe he has a legitimate complaint. If the fellow was using the ball in a manner prescribed by the YMCA, and if the ball failed due to some manufacturing defect, then I don't see how you can blame the guy who got hurt.
If, OTOH, the use was non-standard and the ball was OK, then he's got no case.
If the ball failed because he was over the weight limit, that’s his own fault.
Either way, I don’t see that the Y is responsible for the ball bursting. However, in today’s lawsuti happy mindset, that’s totally irrelevant.
Big *if* there. I can’t see that that’s how the ball is meant to be used.