Stupid people!!

Came to work this morning, decided to take the elevator. One guy is already there waiting. After a while I see that he has pushed the down arrow... I reach out and pushes the up arrow. He turnes his head my direction, and then back.
His elevator arrives. He steps in, I'm still waiting. THen I see that his elevator don't go down, it goes up!! ARGH! Why don't you tell me that you pushed the wrong button!??! I have to of course wait two more boring minutes.
Where is this going to end....?