A month or so ago I watched this 60 minutes of his Half Dome climb ... https://www.youtube.com/watch?v=SR1jwwagtaQ https://www.youtube.com/watch?v=SR1jwwagtaQ

A month or so ago I watched this 60 minutes of his Half Dome climb ... https://www.youtube.com/watch?v=SR1jwwagtaQ https://www.youtube.com/watch?v=SR1jwwagtaQ I seem to recall him saying in it one of the big risks is suddenly being overcome with fear or vertigo from the height.