You can only post things you have done to yourself... by accident...

I've dislocated my little toe on a bed frame and howled - it bled and to this day, is wonky...
I also fractured my middle toe (the long one) as slid into a shower tile once... I cried then too.
The dislocated toe incident made me cry more.
Then I walked into a door frame, gave myself concussion and had a huge lump on my head.
True story - oh what a day that was......
I think I've also fallen over in public on a number of occasions and given myself severe grazes (drunk or not, I used to fall periodically).
I've fallen out of a moving wheelchair which was an old fashioned one (stolen from a hospital many years ago with a friend), when flying down a street, and fell out of said wheelchair which did a 360 degree turn, and as a result, received a bruise the size of my thigh which was black, purple and gree for six weeks...

What have you done?
Wierdly, I've never broken a bone.