I had a topic about this awhile ago, so I'm just gonna rip mine from there.
Ouch.
I think the worst pain I had, was last year, I was looking for a missing board game in my closet, and one falls off of a closet shelf I had in the closet. As I start to pick up the mess, my dumbass of a brother was helping me, and wasn't too careful when he "accidentally" knocks off his paper mache model volcano he had kept on it, and lands right on top of my head. A huge chunk broke off of the volcano, and blood was coming out of the top of my head. I couldn't describe the pain, because in the last year, the spot of the skull hasn't fused yet, making it a "soft spot". Afterwards, I punched my brother in the face for being a twit, my mother took me to the hospital, and I had to get 8 staples placed into my head just to seal the wound, and they didn't use jack stuff for painkillers either. I struggled desperately, but they eventually got the staples in. A month later, my father pulled them out with a pair of pliers. It hurts.