A fall... and then a different sort of accident

Joseph slid off the stool as usual, though he was a bit hasty. His bladder was fit to burst! He hadn't been able to pee all day, having to rush to class because his roommate had been showering when he was getting ready, not leaving him space to pee. He hated using the public restrooms, but he had to.

Also in the class was Monica, a girl who Joseph had gone to high school with and who had always been a bully, and seemed especially to love bullying boys. She "accidentally" turned and put her foot in Joseph's way, making the small boy tumble to the ground. The hard impact knocked the wind out of Joseph's lungs and more importantly, the pee out of his bladder!