This report:
http://www.tsb.gc.ca/eng/rapports-re...7/a06p0087.pdf
Gives some basics of how things can go really wrong with mountain flying - even after training. The report contains errors, even after being reissued to correct several errors, but generally is an excellent introduction to the perils of mountain flying.
I know a whole lot about this particular accident, and did some mountain flying after that crash, with a lot in my mind about mountain flying safety, the whole time! It is not to be taken likely!