What gets me are those who wear shorts and sandal (sockless) when the temperature is hovering around 0 F (or even C) and there's a BUNCH of snow and ice on the ground. I've done something similar, going from a showerhouse to the hootch in my underwear and shower shoes when I was in Korea when the windchill was -24F, but a) it was only a few yards, b) it was not my normal daily attire in such weather, and c) I forgot the third reason.