The star pitcher on my little league baseball team threw a high and tight fastball that hit the batter in the face. Completely crushed the kids nose.
Total accident obviously, but it was pretty horrific. We were all around 12-14 years old. The kid was screaming and rolling around on the ground while his parents and the coaches all tried to keep him from thrashing and keep a towel on his face to slow the bleeding.
The kid who was pitching was fucked up from it, started crying and stormed off the field, said he would never play baseball again. He felt horrible about hurting another kid.
I can't imagine how much worse it would be if you accidentally killed somebody. These kinds of accidents are so brutal because nobody did anything wrong, just supremely bad luck.
Dang, that's too bad. Hopefully one day!