This thread is becoming morbid.
We could talk about mountain pilots who wear shorts and t-shirts and take nothing else along to wear, and then if they survive the high DA crash on a nice summer day, freeze to death and die of exposure that night, if you'd like.
More often they never learned not to fly up the center of the valley and they go up the wrong one, can't outclimb the terrain, and stall/spin on those nice hot days, straight down into the forest canopy, without even breaking a tree branch going straight down.
Then we search for them for weeks, and some hiker finds the aircraft and bodies three years later.
A couple have had video cameras on board, and the video serves as both a warning to get a mountain checkout and take a mountain specific ground school course, where... they often play the videos as examples of doing it wrong.
Aviation over hostile terrain, be it water or rocks, is often a morbid tale of poor planning and even poorer airmanship and decision-making. Kent posts regularly about how to properly do water crossings in single-engine aircraft.
People who don't learn from the mistakes of others and seek out knowledge, often learn the very hard way in both hostile terrain environments. And others.
