Skydiving or Bungee Jumping?
The bulls in Pamplona?
Been hunted as sport??
A 3 day DVD-athon???
… even putting that extra shot of brandy into the Christmas cake is good if thats you living it up. 
I was at work a few years back when a wisdom tooth that was coming in wrong (sideways) snapped off, leaving a sharp bit of bone poking into my cheek. So I took the nail file from my swiss army knife and ground the tooth down until it was no longer poking into my cheek.
Self-applied non-anesthetized impromptu dental surgery has to count for something.
Wooo… no other posts needed!!
Seriously. Badass of The Dope Award goes to MaxTheVool.
Well,
I’ve been a thousand feet underground for a week at a time several times (its no big deal and honestly about the half the population could do it).
I’ve had a rocket engine blow up in my face.
I fell on top of a running chainsaw once. My face was inches from the still moving blade before it was all over.
I drove between two cars pulling out from a side road onto a major highway at about 60 mph. The gal in front never even saw me. The guy behind her probably needed clean underwear (like me).
It’s not me in the video, but I have done this.
I went skydiving. It was fun
Class V whitewater in a kayak. And also out of a kayak.
The first time I went in a plane, I jumped out at 14,000ft.
I did happen to be attached to a skydiving instructor at the time, but details…
That’s got to be the most exciting experience I’ve been in a fit state to remember.
Due to a weather emergency, I once had to land an airplane in, essentially, someone’s backyard. I did so successfully - i.e. I was unhurt and the airplane was immediately reusable. Also, did not need new underwear.
I’ve been para-sailing, white water rafting many times, caving where I had to turn sideways and crawl through to get through some of the tighter passages, rappelling and parachuting three times (twice on purpose). I’m not exactly a daredevil, though. My life has been much calmer than some of the maniacs I know.
You mean aside from changing my name on the Straight Dope to be my real name? 
Not really “extreme sports” quality, but…
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Parasailing behind a boat.
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Competing in a rodeo between chemo treatments (I was getting treatments for my lymphoma every 3 weeks, and I did wild horse races twice in between my final two treatments).
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Rappelling into a cave and emerging at the top of a 100+ foot tall chamber (the last 100 feet down were done without being close enough to a wall to touch anything - just hanging free).
I used to skydive a lot. Most memorable jump was probably the staggerwing open cockpit biplane - pilot did a loop, I hung onto the top wing with the plane upside down above me, then let go and he dove down so he was beside me in freefall for a bit.
I landed a malfunctioned reserve canopy after a high-speed total on the main but that wasn’t my intention when I left the plane.
One time, I spelled the word ‘extreme’ starting with an ‘X’. I’ll do it again, I don’t care.
Also, I once tried (unsuccessfully) to pop my dislocated shoulder back into socket, Lethal Weapon style.
Didn’t even remotely work.
Fuck you, Mel Gibson.
Climbed Longs Peak without gear. It’s not as bad as those pictures suggest, but it’s hard to even see the trail, and that’s a no-gear-required trail! At the end there’s a nearly 45 degree scramble up a nearly bare stone face. But I wasn’t as extreme as some people next to me. They were walking this 45 degree slope with hardly any handholds – upright! If they slipped they would have tumbled 8000 feet down to their deaths.
ETA: Oh yeah and you climb up and down around 5000 feet in a single day.
I cut a tangled emu out of a fence with a chainsaw once. To preserve the fence of course.
I’ve logged over 400 hours in the back seat of various fighter aircraft as an aerial photographer documenting weapons testing. Wild experiences too numerous to list, but a few highlights:
–went out of control in an F-15 doing Mach 2 in a steep dive. Protocol said that anytime the aircraft went below 10,000 feet and was not in controlled flight, we could consider our obligation to fly that airplane terminated and pull the ejection handles. Problem was, the upper limit for survivable ejection is about 600 knots. We were going way faster than that, and had we ejected, important parts of Oak–like my limbs and head–would have been scattered over several miles of the Gulf of Mexico. Pilot finally recovered the airplane at about 2,000 feet or so.
–serious mechanical failure in an F-4, in IFR conditions.
–set what was then a world record for filming the launch of an AMRAAM air to air missile at 1.6 mach and 7.5 Gs. The camera I was using weighed 16 pounds at 1 G. I understand that after I left the service, my former boss filmed one at 9 G, but he cheated–his plane didnt pull with the shooter, and he didn’t have 9 G on him when he filmed it. Mine pulled with the shooter, and I had 7.5 G on me when the missile came off the rail.
–filmed several missions where the bomb or missile came off the lead airplane badly, and hit the airplane, scattering parts everywhere, but the plane landed safely.
–landed an F-15 from the backseat. Most of the guys I flew with were pretty generous with allowing me a little stick time after the mission was completed, but they did the landings. On my last ever ride in a fighter, called an EOT flight, I’d requested a dog-fight training mission, because I love that stuff. The pilot let me fly one of the engagements, which was really cool, and also gave me the airplane as we were returning to base. I kept expecting him to take the airplane back when we got close to the landing pattern, but he didn’t. Obviously, he was there and ready to take control if I screwed up, but he let me take it all the way to the ground.
I’ve done skydiving, and I fed Caribbean reef sharks. Had an 8-foot shark that was chasing a grouper swim between my legs.
Actually, I’ve had some very entertaining times removing cows and goats (and one young bull) that had gotten their heads/horns stuck in fences and/or gates.
Bungee jumped twice.
Rode a mountain bike over a 30 foot cliff and landed in a river that was about 2 feet deep. Luckily I didn’t land on the bike. Other than getting wet, me and the bike were fine.
Drove figure 8 race cars for 3 years.
Drove a 1971 AMC Javelin through a barbed wire fence and about 200 feet into a corn field. I was doing about 90 mph I came over a rise and the road made a 90 degree turn to the left. I was still doing about 75 mph when I left the road.
But none of the above compares to my attempt at performing an automotive thrill show stunt at a local race track. The track owner offered me $300 to drive a car off a ramp into other cars. I countered with $500 for something I saw on a video tape a few years earlier. He accepted.
My plan was to stack 3 cars on top of each other and drive a car off a ramp into the middle car knocking it out of the stack and have the top car land on the bottom car. For the base I used a big Buick station wagon. The meat of the sandwich was an old Ford van and on top was a Chevy Monza. I used an AMC Rebel as the ramp car.
Everything went fine till I came racing around the turn of the track. The car tried to spin out and when I got it going straight, I wasn’t going as fast as I needed. I came off ramp and hit the Ford van with a mighty thud. All I saw was the van slowly start to roll off the Buick when the Monza came crashing down on the Rebel, hitting it right at the windshield opening. I had beefed up the roof of the Rebel so it didn’t collapse on me. The impact did knock me for a loop though, it took me about 10 minutes to get my bearings straight.
I got my $500 and and offer to pay me that again if I ever wanted to do it again. I politely declined. I decided the thought of cars falling on me was not very appealling.
Kayaking with Orcas (not by choice, they showed up, and I headed for shore).
Bootskiing down a mountain where snow was still in a defile.
Stunt plane loops
Low altitude flying in an S-3