I also don't like it when a person looks at the button for his floor, sees that it's already illuminated, and goes ahead and presses it anyway. As though the elevator is keeping track of how many people to let off on the 5th floor.
Oh, and one more thing -- I spent three months in England, and didn't pick up a sexy accent or even foreign speech patterns. I'm terribly unexotic. But the one genuine blunder I made was in Newark Airport, right when I got home: we were standing around figuring out the easiest way to get to the parking garage (damn, I can't even remember what they call "parking lot" in England, but I remember it's funny), and I pointed towards some elevators and said, "we can take the lift." Jeff looked at me and said something like "that's called an elevator in this country," I don't remember exactly, it was a while ago.