brrr, my worst was in a truck/bus stop couple, some hours??, outside of NY in i think '62 .. we were first out of the bus, which was not going any farther that day so were first to be sent to a room .. the lock was frozen and my hands no gloves were tending bluish after just a minute or so of trying so had to retreat back to the lobby where a lovely stranger lady gently nursed them back to normal ..