Quote Originally Posted by Rater202 View Post
1: It is both medically impossible and physically impossible for the kidneys to explode because you held it on too long. The bladder exploding is more likely, but even then most people would involuntarily piss themselves well before getting to that point.
Throughout history the odd person has killed themselves by suffering a burst bladder after "holding it in too long" e.g. at a formal feat when it was very impolite to leave the table to relieve oneself.

Burst kidney? - no chance, it's not a holding vessel, it's a filter