Reddit, what is your biggest "Oh shit, I'm F&#^$%" Story?

I'll start.

A few weeks ago, me and the fam were putting up lights on the house for the holidays. While on the roof, I was leaning over one of the highest parts of my house and trying to hang a line of lights on some trimming. Because of how the roof was designed and what not, I had to lean out quite a bit, and not being afraid of heights I was being way to careless in the whole process. As I leaned over, I sort of started to slide of head first, and at the last second was able to grab on to the ledge and work my way back up. It would have been a good 30 or so ft fall head first. First thing that went through my mind as it happened was, "Oh shit, I'm fucked."

TL;DR- Basically almost fell 30 ft off my roof head first while trying to put up Christmas lights, and barely managed to catch myself.