Adam hurt his knee playing softball. I think he landed on it too hard, on a hard ground, and that night it started swelling up like a balloon. Now, 4 days later, it is still swollen (although maybe a little less), and there's bruising behind the knee. I'm sure he tore some sort of ligament, but we don't know what. Has this happened to anyone else? Right now I am having to take care of 3 boys, because Adam can only get around with crutches.