Saw a road bike woman who went down in light rain at the bottom of a MUP hill where it turns fairly abruptly (where the Custis trail goes under 66, close to where it meets the WO&D). I see skinny-tired riders have problems with that place sometimes. She didn't unclip before she went down, which almost certainly contributed to the amount of road/bike rash on her pinned leg. But she was OK.