Okay, not a mountain, more like a large hill, or whatever you call a pile of dirt that goes up over twenty feet with a windy road laid on top going around a sharp blind corner.
I was coming up on this corner, debating how fast to take the corner. And I noticed I couldn't see around the side of it. Thus, I opted for the suggested speed sign, always a safe bet on a corner. As I was coming up the road, there it was. A semi-truck pulling a trailer came around the corner towards me. They weren't just slightly over the line. They were a good solid into my lane by at least 3/4ths at apex and then started moving back into their own lane.
