Also check out https://www.wildfirelessons.net/High...&forceDialog=0 . This is the report on a helirappel fatality. I've referenced it before in human factors discussions but it's been a while. If you're a student of human factors in accidents, read the whole thing. For quick look, read the summary narrative, check the photos from page 25-27, and read the human factors section starting on page 33. The sub-section on our visual system is fascinating.