uh, of course. I don't obsess about it but sometimes I notice myself checking shadows or hesitating before entering empty elevators.

This reminds me of that conversation I had with someone "you know that game you played when you were a kid -- what would you take from home if you had to run for it? what would you grab if you had to leave in a hurry?" "No. I never had that thought as a child." From which I concluded that we had grown up on different parallel planets that were accidently both named Earth...