I've been fortunate enough in my time skating down hills to have never broken a bone. Drink your dang milk folks. Though I've certainly had my share of gnarly spills, here's a few examples;
Skating an extremely gnarly and notorious eastern TN run. Following behind a extremely skilled rider down a fast straight and approaching a heavy right turn. I'm riding some really old Sector 9 Butterballs because I wanted to just destroy them. Homie ahead throws a clean toeside standup and makes the turn, I throw a hands down toe drift following his line and seemingly kill enough speed but could absolutely not hook the slide back up. I slide towards the massive rock pit on the outside and essentially jumped over it knee first into the berm. This was like this third run of our trip, I was super sore but nothing broke. Learned my lesson about skating crap gear on unfamiliar roads. Swapped to wheels with actual grip after that.
Another instance I was throwing a squatter on Mach 1s. Normally not an issue as they slide pretty easily, but the front concave of the board I was on (Jet Kool Kick 3D 2013) was absolute garbage and I always had trouble slipping on heelsides with it. I try to run it out and my leading knee folds the wrong way under me, causing me to hyper-extend it. Still get chills thinking about how much worse it could've gone. Thankfully I wasn't skating alone and my friend helped me down to the car. I couldn't walk for like 3 days but it healed on its own.
Also broke my TSG Pass while holding it and falling backwards because I lost balance on my board while pushing up a hill in the pitch darkness.