I get vertigo from heights very easily, so much so that I even have to look away from movie scenes where a camera looks straight down, like the scene at the beginning of The Matrix where Neo is on the ledge and drops his phone and the camera follows it down.

A couple years ago, some friends got me to go along to one of the Spiderman movies. Early on, there's a big fight scene on a bridge, and heroes and villains are flipping around in the air, falling off towers and things, and I realized it wasn't bothering me at all. None of it had any weight, or whatever it is about heights that usually makes me feel sick even when I know it's fake.