Not much:
The steering wheel from my bike once punctured my head, well not the skull, when I was 7 or something. It fell of a cart, right on my forehead, screamed so hard the whole neighborhood was standing around me. 5 Minutes later I was sulking on a chair at home, with a big bleeding wound on my head, bitching about how I wasn't allowed apple juice. 10 Minutes after thát, at the docter, I tried to make a run for it because the docter wanted to poke a syringe IN the wound, o my how did I scream.
A mollusk sliced open the squishy part right under my kneecap, almost a square wound (2 cm deep, 2 cm wide), stitched without sedation!
Broken my elbow about 2 years ago when I fell with my bike, but I still biked home! Well I had to, I lacked a cellphone.
Last year I stomped the ground out of anger só hard, because I was having a...heated argument with my dad, it was pretty swollen and stiff for about 3 weeks and I limped for just as long. Better then hitting my dad with so much force, I doubt I was typing this to you guys right now then

Also hitted the wall and door once for the same reasons. The door now has a nice hole in it, and when I hitted the wall something cracked and I could barely move my middle finger and pinky for weeks. I guess I broke my knuckles, since both knuckles now have an odd bulge on them. Still hurts sometimes.