I spilled a drink on an ex cop at a burger joint.
OK, that was funny 
Climbed up a waterfall on a cliff in the Lake District in Cumbria. And by “up a waterfall” I mean that literally. Not beside the course of the fall, but up the watercourse itself.
Hiking through Horseshoe Canyon, Utah. I was 62 at the time and very out of shape. The max temperature that day was 123 F. I was hiking alone, and didn’t tell anyone where I was going (very very stupid). I was diabetic and suffering from a migraine, lower back spasms, heat exhaustion, cramping leg muscles, extreme fatigue . . . and finally, hallucination. The canyon floor is 800 vertical feet from the trail head, which isn’t much when descending, but pure hell climbing back up . . . in the dark.
I didn’t know at the time that this was the canyon where Aron Ralston had to amputate his own arm.
Also . . . skiing on a glacier in the Alps, with no prior experience.
I drove a 1968 Bug too fast around corners. I have a 360-degree spin and a across-two-lane-power(?)slide on a wide right hand turn to my credit…both were pretty damn scary (especially to the other cars in the intersection!)
Bungy-jump (Nevis) & Sky diving (Franz Josef) when I took a trip to New Zealand a few years ago.
I’m terrified of heights so I really had to force myself. It was terrifying & amazing at the same time.
I have never screamed in fear at anything (mugging, beatings, dog attacks) except when I did the skydive.
After I did the skydive, the bungy jump was scary in a different way.
I considered getting the “extreme poutine” at the pub on campus today. 
No, really. I haven’t done many extreme things, though I did go ziplining in Québec last summer.
Took a bath in the Lochsa river in February.
I’m a bad-ass, I know.
Galloped my horse down the middle of a gravel road. She went flat out (about 30-35 mph) while I urged her on. We probably went two miles before I pulled her up, and we went for a well-deserved drink of water and a detacking and grooming for her. Of course, she got some carrots and other treats as well.
Note that I was only dressed in T-shirt, shorts, and sandals; and did not have a helmet. If the horse had misstepped, or hit a pothole (of which this road had many) and lost her balance, I was toast in more ways than one.
I’ve always said that riding a galloping horse is the closest thing you can get to riding a flying carpet. I will still “ride the flying carpet” when I get the chance, but now I do it much more safely: jeans and a riding helmet and proper shoes, at the very least.
Talked my way out of being held at gun point. Took 2 hrs and I broke down after and sobbed like a baby but we both walked away from it alive
I once wrapped a bed in polyethylene sheeting and slathered myself and my girlfriend with six tubes of KY Jelly for an hour of adult-oriented slip-n-slide.
I’m sixty-six and have ridden a motorcycle for 34 years without a serious incident. Although maybe that means I’m not riding it extremely enough!
I spent the last half of my career group counseling addicts most of whom were also criminals and mentally ill. Had my life threatened multiple times.
I have sat in hospice with a number of dying people who had no family.
But my favorite extreme day happened this March when I rode fifteen zip-lines over the jungle in Costa Rica, then rappelled several high cliffs. After that I had a long ride on horseback to a waterfall, spent an hour whitewater tubing and finally had a mud bath and a soak in a volcanic hot pool.
Does this include everything I could have been arrested and imprisoned (legitimately) for?
Wandered around for a day in East Germany, without a visa, in a conspicuously illegally-plated car.
Forged bank receipts for exchange in Tanzania to buy international plane tickets with black market currency, round trip and back into Tanzania.
Climbed in windows in Ceaucescu’s Romania to avoid paying for lodging.
Interrogated for an hour at gunpoint by revolutionary militias in Mozambique.
Traded a contraband copy of Playboy Magazine to a couple of Soviet soldiers on a Russian train, for a deck of cards.
I was the first American and maybe first westerner to pass through Syria after the 1973 war, and was debriefed by the US Consul in Amman who wanted to know what I saw, which was mostly just smoking ruins and very, very hospitable and friendly Syrians.
Slept for a couple of hours in an Algerian jail, until the police found a vacant hotel bed for me.
My wife has done some crazier stuff than me, like getting arrested in Bolivia for climbing a fence to illegally enter an archaeological site (taken to police HQ and told not to come back). She’s been bitten by both a shark and a poisonous snake, and walked for six hours out of a jungle with a dislocated elbow. She lived for a whole winter in Northern Michigan woods in an abandoned camper, with her two young daughters. Her father, a novelist with a Wikpedia bio, was sent to prison when she was ten . So she’s pretty well got me for extreme stuff.
My Wife and I zip lined in CR too. 55mph and 600 feet up over valleys. It was fun but not what I expected.
Just READING his post caused the longest duration I’ve held my breath, yet. I’ve done some rock climbing in the Tetons and Yosemite and Quincy Quarry, and cut sheep out of fences, and been the first one to get on the back of that particular horse. Also, I can do half of an Eskimo roll.
I am a wimp. I am afraid of most things, ie flying, driving on the highway, going out when it is dark. I am also a bit of a prude.
But I did go skinny dipping in Mexico one time. It was the middle of the night, I was with my husband, before we were married. It was wonderful, until the resort guards heard us, and came down to the beach with flashlights, that were so big, I felt I was in a spot light!! They told us in broken English to get out of the water. I tried to explain I had nothing on, and if they could turn off the damn lights, but they did not understand. So, I had to come out of the water, stark naked in a spotlight. It was pretty funny, but I am sure they see goofballs like us every night.
See, I am not very much of a risk taker. :o