Haha just bad luck really. It sounds stupid and unbelievable but I just fell over. I was walking to the bathroom at home and the next thing I know I was on the ground in a shitload of pain.  The surgeon says that because of the significant tendon and ligament damage he thinks I must have just twisted my ankle first, and then the way I fell after that broke the bones, and the impact of the fall doing some damage as well.  I'm getting bone density tests and stuff because this shouldn't happen to a 21 year old. But seeing as I've never had any problems with my bones before I think it's just bad luck.