This seems to be part of a general phenomenon - as soon as a decision must be made, stop and think about it. Unfortunately, the places where decisions must be made include the ends of escalators, after passing though narrow doors into corridors where it is possible to go right or left, etc. The notion of pulling off to the side while thinking about what one should do next - I guess expecting people to do that makes me a DYKWIA in the language of this board.