Mine are minor compared to these ^^^^^, but perhaps somebody can learn from them. I raced at a pretty high level into my twenties, and had my fair share of crashes {Newfy might say he never saw me finish a SL}, but I never, luckily had any significant injuries. No breaks other than one thumb, no surgery.
In 1979, I was at Telluride with a few friends, all good skiers. Telluride was the Wild West at the time. We hit it right in terms of snow. The second day that we were there it started to dump, and dump, for three solid days. The part to remember about this was NO LOCAL KNOWLEDGE. On the second day of the storm, we were skiing on The Plunge, I think. One of the steep trails that dropped into the town. Visibility stunk, heavy snowfall, and a lot of powder. Now naturally, we were just ripping.
I was flying down this trail, behind the other guys, or next to them, skier's right. All of a sudden, I felt like I was no longer in bottomless powder, It just felt weird. Then BAM, I just exploded. Turns out that I had dropped about 10-12 feet onto the far edge of a cat track.....which has probably been cleared an hour earlier, and was rock hard cement, covered by about 3 inches of fresh. I had not seen any of it coming. I hit the flat, and I was moving. Both skis blew off, and it knocked the wind out of me, broke my goggles, cut my face, and probably I was lying in a heap when a groomer comes up to me, pretty fast, all lights on and stops. Driver gets out to check on me, and say something like "good thing I was paying attention, or I probably would have run you over." Nice. Wow. I ended up skiing down, found the hot tub and a bunch of beers. All good. Bruised, but OK.
So bad visibility, not knowing the nuances of the trail, no local knowledge......all can be problematic if you're flying.
About five years ago, I was skiing in very flat light on a steep wide-open trail that I know like the back of my hand. Late afternoon in late December, following about a foot of fresh snow. Again on top of rock hard cement. The snow had stopped, and things were pretty skied out and chopped up. Really hard to see. I was skiing pretty fast on good crud skis. All of a sudden I nailed a BIG pile of snow. Feet stopped, and I was airborne, headed downhill. It was like slow motion, and I just thought "please let me land in the soft stuff." Nope. Right on my hip on a patch of "firm" ice. Bang.
I was 58 at the time, and in good shape. Also a lifelong skier, and thousands of days on that hill. I had not slowed down to accommodate the mix of the really variable snow the crud, and my middle age eyes {despite having great fog. and low light lenses}. I was skiing like I would on a sunny day. Bad move. I was in quite a bit of pain, but could ski down. Pretty much on one ski. Had it checked the next morning. No breaks, no tears, just a "good bruise." Now even being in shape, that hip bothered me for most of the season. After months on the bike, stretching and weight work, it felt "all better."
So my lesson there.....don't outski what you can see, unless you know what it is, and are 100% confident in where you are. I don't think anybody would say that I've "slowed it down" much, but I'm paying a lot of attention, and watching my terrain. Minimizing the surprises. Middle aged eyes.
Agree with many of the other comments. Interesting stories. Family friend, a beautiful lifelong skier, ended her skiing days at about age 80 when she was taken out by a snowboarder {not a skilled one} while on her annual two weeks in Vail. Broken Femur. Surgeries, metal plates, etc. Oddly, a good place to be injured and to get care. The boarder was very apologetic, stayed with her, checked on her at VVMC.
Be safe!