I've found myself in a quite a few precarious spots while shooting mountaineering photos.
But probably most notably, shooting from the back of a moto for a pro cycling race that crossed over 11,312' Monarch Pass twice. Very exciting!
I stand next to big cliffs probably a couple times a week in the summer. Haven't fallen off yet...
Then there's the thin ice...
This spot at the Black Canyon is next to a 2000'+ drop. I only go for this perspective when it's calm and not wet like the first shot!