I did a lot of Para-dropping when I was in the service at about 800 feet! Pretty crazy when you're so low. Did a lot of crazy dirt bike races in my day also. Still have the aches and pains from that !
I used to blow things up with home-made explosives. Great fun.
Rock climbing, bouldering, white water rafting, going down rapids with nothing but a wetsuit and a plastic board (I'm sure it has a shorter name, but I cannot remember it).
Zip lined at Icy Strait Point in Alaska. It is the world's longest continuous zip line.
Jumped off a bridge did a flip landed in the water and swam against the current to the other side of the bridge and climbed the bridge.
Repeat.
(Everyone I know does it, kind of like a skill everyone in the country knows like fishing)
The Terror-dactyle in Colorado. It's a bungee slingshot into a canyon. Pretty fun! If my job counts (firefighter), I've done some crazy sh*t there too. Hard to narrow it to just one.
I haven't done anything that crazy.
Transmygration.