Alright, I've got two to share. One gory, one plain-out stupid. Both at Whistler. Both products of my own mistakes.
The first one is my most injurious crash, by far. Resulted in completely torn ACL and MCL, and surgery needed to put staples into the ACL. I still don't have an MCL for my right leg.
What happened was, I was in a ski school class (intermediate) and we were getting out of the summit lodge after lunch. GLORIOUS day, bluebird, with nary a cloud. I was thinking, "What a great day to be skiing! And I'm improving in the class so well!" as the class went down the first after-lunch run. Now, our teacher decided to go through a cut to a blue run, and I was beginning to lick my chops in anticipation of a good schuss down the mountain.
So, in we go to the cut. Good interval between each person as we entered, a 3+ second gap. There's a left turn, there's a right turn, and there's the rest of the class down at the bottom of the cut, as it switchbacks twice... alright, let's go join them
As I burst out of the trees, the sun shone down brightly, and my orange goggles aren't exactly known for light blockage, and so... I missed the last left turn. There were 3 switchbacks, and I missed the last one, which was pretty steep, and which meant that I flew off the cut at a good 8-10 feet height, going at a pretty fast clip.
At that moment, I was thinking "Oh my God I'm airborne!" I clearly remember flying neatly to the side of the class, who were looking at me with varying expressions, and trying to windmill to retain my balance. To no avail, of course, as I manage to tilt myself forwards and slam face-first into the ground, which was thankfully not completely hard-packed, though it was pretty solid snow - semi-groomed run.
I laid there for a moment, took a deep breath, counted my lucky stars that I don't feel anything broken, and with the help of my trusty Scott poles, manage to stand up and yell "I'm OKAY!" to my ski instructor, who was making his way over to me. Only then, as I relaxed my weight from the poles, did my right knee give way, and I fell bonelessly back to the snow. My right knee was useless, and it refused to hold still, which meant that I could barely move anything below that side, and I couldn't feel a thing. It was completely numb, for which I was grateful. My skis had apparently hit tip first, with me still going forwards, and dug in. The bindings DID NOT release, and I hyper-extended my right knee, while my left knee was luckier.
Of course, my ski instructor waved down a passing patroller - we were barely 400m from the lodge, at this point - who in turn called in some more patrollers with more equipment. While waiting, we rolled up my ski pants, and he declared my knee to now be "floating free, like Willy" thanks to snapped or torn ligaments. A snowmobile turned up, and we tried to get my ass on the rear seat, but the numbness was wearing thin, and I started feeling pain. Plus, it was a bear to get me seated with legs straddling the seat. So, I got a ride in the sled, and the patroller asked if it was ok if he went fast. I said yes, of course, and had an exhilarating ride down while watching the scenery blur past and feeling the sled thump into the mountains.
Went down, went to the clinic. Got an x-ray, pronounced with torn ligaments, told to go see orthopedic specialist when I went down to Vancouver, given a knee brace/splint thing, and lots of T3. Yum. Also given crutches, and was asked whether I needed spike tips due to snow. I said yes, my dad said no. He was probably acting correctly, saving the lives of my classmates back at school who I would've poked if I had spike tips.
I needed surgery, and I went under the knife three months later, after having gotten around with that knee stiffener and crutches for a long time... Back on the mountain, next season, with the same pair of skis and boots and bindings and what not, suitably chastened, and with a knee brace this time. Plus, two huge staples in my ACL and no MCL at all.
It took me a long time to get past my fear of trees and cuts and whatnots...
The second one is a considerably simpler, and funnier. I was going down Green Line (long cat-track, ~4-5 km total) on Blackcomb, about to go catch up with some of my friends who were further down the trail as I had stopped to re-adjust my boot buckles. I was on a mostly flat portion, which was clear of people 20m ahead and 20m behind, with pretty good snow, not too terribly tracked or icy, with no stress at all. We were doing an easy run down to the lift, and I was enjoying the weather - nice day, somewhat cloudy but good visibility.
Suddenly, as I was crossing another run (blue, I think, with a pretty good slope, perpendicular to Green Line) I veer off to the left, and my brain can't seem to tell my legs to compensate, and I go right into the ditch on the left hand side, which abuts the higher run and makes for a nice little drop for the blue skiers. I slam the tips hard, release on the bindings, continue forwards, and have a root poking out that slams me right in the goggle lens while my feet fly out from under me. The wind is knocked RIGHT OUT of me, and I was groggy for a good 30 seconds or so, enough time for the skiers behind to come up and stop and ask if I was ok.
I slowly got up, brushed myself off, and told them to go on their way because I was perfectly fine. My lens was deeply gouged, and had actually popped OUT of the frame, and the support ribs on the top had broken - this was not an interchangeable lens goggle, folks, cheap Uvex for $30 at Costco - and I was glad the thing had not shattered as it hit the root. Fixed the lens, clicked in, and skied off, with a great story to tell.
I still don't know what made me veer off like that; the track was pretty level, with no bumps or dips or whatever, and I was not tired or daydreaming or anything.
Not as scary or gory as some of you, but those are my two worst ones. Never fell out of a chair, or broken anything (boots, skis, bindings, poles, bones, people) so knock on wood.