Fuckin' 'ell, that makse me even more glad that I didn't ever take shop in Jr. High or High School. I was a bit of a klutz back then.
Man, I'm getting phnantom pains along my knuckles just thinking about that shit. Gar.
Oh yeah, topic:
Not sure if this really counts as an 'act', but I did see a motorcycle slam into a pickup truck that was making a left turn, facing west on a slight incline at sunset. No fault, really, but I did see the guy flying through the air just after impact. I was riding in mom's truck at the time, and both of us hopped out right away - her to render aid (she's a nurse), me to go call 911. When I got there, she was talking to the guy trying to calm him and keep him from trying to get up. Two broken legs, skull fracture (no helmet) and a fair amount of blood.
As a teenager, that was pretty putoffish, but I didn't freak out or puke or anything. More like stunned into inaction once I actually saw him up close.
I've only been in one or two fights in my life (which came out in my favor, thankfully), but it was all over so quickly I really can't say they were violent. I've seen plenty of them break out, including one last month at 3am in a Waffle house - which was funny as hell, actually, despite all the blood.
And during my first tour in Iraq, while I was in a guard tower, there was some incoming mortar fire. The other Marine in the tower and I ducked down with the quickness, and then after the esplosion called it in and started observing the impact area. The round fell short - about 50-75 meters outside our perimeter - and pretty much wasted this random Iraqi guy on a bicycle. We could see his body out there, still mostly in one piece.
By the time we rolled out there with the QRF ten minutes later, someone had dragged the guy into their car and took off, but there was still a pretty big blood spot on the asphalt. Not sure if he lived or died, but I know he was fucked up pretty bad, and given that he was the only guy on that road at the time - plus the efficiency of the body-snatchers - I'm still pretty sure he was a bad guy.
Sucked for him!