For me, I think it is supersistion/fate. Rational about exit strategy/burns is secondary (though probably rational). For the rest of you - trust me - you don't want to be on a flight where I take of my shoes any earlier than necessary! (And I don't even wear sneakers!)

I see quite a few FF's, particularly from Italy who "cross themselves" on take-off. Fine by me, if I'm on the same flight its good for me too (maybe).

Robert.