My first insight...

I think I know why people get in elevators and hit the floor buttons repeatedly. Here in Glasgow, none of the elevators (or "lifts") I've been in have "door close" buttons. Only "door open" buttons. So the way to get the door to close immediately is to hit the floor keys. This may be my first insight into annoying people.

(And yes, I too have been known to annoyingly hit floor buttons repeatedly. Rarely. Rarely. And usually only to be funny.)