@c531994e that’s a good framing. I would also be afraid of exposure to falling but not heights. Flying in a plane doesn’t scare me. Obviously you could crash, but statistically, it is a very low risk. Me walking/climbing on edge of a cliff, falling is not such a low risk. 

 @3e17b1c0 That’s a good point. I’m also not scared to fly, at least not because of heights.