Aye carumba, can open...worms everywhere.
So many to choose from.
1. I, while not being a fan of heights, went parasailing in Thailand back in 1991. Nothing really unusual about my trip up and back down, it was the next guy. Rope broke and it destabilized him and I watched the guy splat into about 18 inches of water. He survived, but I no longer wish to parasail.
2. Back in the day when I was "smart" enough to ride bulls for the fun of it, I got piss-pounded into the dirt up in Glenburn bad enough to where I had an out of body experience. I vaguely remember it as if I were sitting on the chutes thinking "Jesus Christ, get up and run..." as if I were watching a friend. Next thing I knew I was throwing myself up and over the fence with less than half a shirt on. Ended up getting nothing but bruises (and most likely a concussion) out of it. I was probably lucky that it was smallish bull even though they were always problematic for me to ride being a little bigger than normal bullrider.
3. Working on a drilling rig we were chaining out of the hole back in the mid 80s. Driller was nothing short of a nut on the controls and as I reached down for the dope brush to grease the next stand of pipe, I saw out of the corner of my eye the driller had his hand on the wrong controls. I glanced to see what my tongs were doing just in time to get smashed in the face by them. I didn't wake up until the derrick hand hit the floor. The driller got mad at the draw-works on the rig and took some time out to adjust them with a BFH and never took credit for his mistake. That was about hour number 3 into a 16 hour shift I was working to get the time off needed for the state finals rodeo the next day.
4. Much like JayKay's cycle accident, I managed to do that with a snowmobile one time as barbed wire snared my ski as I was headed out onto Lake Sak at about 45 mph one day. The bruises on my inner thighs from straightening the handle bars was impressive, as was the pain from using my chest to remove the windshield. Teenagers heal quickly!
5. Picking rock the old-fashioned way with a pitchfork was a recipe for near-disaster as a very small rainstorm approached. Just after it started to rain I was getting back on the old 830 JD when I lifted the now wet pitchfork up to slide it down into a wire holder I'd fashioned for it. The zap from the clouds left me sitting on the ground in a state of confusion long enough (10 minutes???) for my stepfather to come out to the field and find me with a bad hairdo. I've hated working with electricity ever since. I was about 13 at the time.
6. Speaking of electricity, I was running some wiring from a basement I was finishing out to the garage where my electrician friend would eventually make it hot by hooking it up to the panel. As I was trying to weasel the VERY LAST damn one out to the garage, I was up on a short ladder and really struggling at getting it through the wall. In an effort to get a better look at the hole, I over-extended myself and reached up with one hand on the house's natural gas service line and the other had reached around a floor truss. As soon as I got the second hand in place, 220V streamed through my body from one hand to the next. The thud and subsequent beller as I hit the floor brought my now ex-wife running into the basement to see what the hell happened. As luck would have it, my second hand managed to find a spot on the AC unit's electrical feed that had been run past a staple that exposed about two inches of the hot wires. Yep, 220V surging through the chest is not something I would ever recommend. Probably lucky to have been so over extended on the ladder that gravity eventually broke the circuit. The ex was mostly mad because the AC unit quit. This was some 14 years ago now, I still hate electricity.
7+. In my younger and dumber days (sub 22 years old), I managed to roll a pair of 77 Ford pickups. One of which had the driver's side of the cab pushing down into the seat, I'm probably lucky they didn't have seatbelt laws back then. My buddy, I'll call him chainsaw, launched his pickup down the Sanish curve at about 70 mph and off the road into the trees actually flying over some trees until big momma tree V'd his front end. My face enjoyed an up-close view of the windshield shattering. It literally took a chainsaw to clear the trees he flew over to retrieve his pickup. Several people have been killed or permanently paralyzed on this corner over the years it was a gravel road.
Note, not only do I drive nicer nowadays, but I ensure the people I ride with do as well. I've gone 30-some years now with nary a paint scratch.
I am a lucky SOB, and I know it.