What kind of brusies did U have that had different affects to your bones & body?

I think the worst injury that caused a lot of bruising was when I went rollerblading without wearing any knee pads. I was going too fast and rammed into a wall because I was trying to avoid running into my sister. But I hit my right kneecap really hard and it turned all red and started swelling up. At first the bruise wasn't all that big but by the next day my entire kneecap and the surrounding area was all black and blue. The bruise was visible for about two weeks and I think I totally messed up my knee because of that incident. I sometimes still feel some pain from it once in a while.