Two come to mind. I was with another couple in their small boat in Eureka, CA. We were just tooling around, protected by the jetty and not going out into the ocean. The one and only motor quit, no oars (dumb) and no lifejackets (dumber). So there we are drifting out towards the ocean! We were rescued by the Coast Guard but that was pretty scary. Hard lesson learned, never EVER go in a boat without a jacket! Another time in Colorado I almost went off Monarch Pass on my way to Denver. There was a bit of snow on the ground and my car started fishtailing. No guard rail but I was able to stop before sliding down into a long long long drop. I sat there for a bit trying to stop shaking when a highway worker came over to the car. Didn't ask if I was ok. Just told me to move the car so that rescue workers could retrive another car that went over!