>>457216Falling in a rockslide, avalanche, unstable terrain, or some shit like that. Happened to a friend of mine when we were about 50 miles in up in dixie National forest. The ground shifted from underneath him and he fell into a ravine, breaking his legs. It was cold and there was little I could do to treat a compound fracture out there. Luckily I'd bought a satellite tracker and we got airlifted out after a whole day.
I'll never forget his bloodcurdling scream, and how his tibia broke through the skin.