He can only be doing this for one of two reasons:
1.) He is so impatient and/or stupid that he thinks the speed of the elevator is directly proportional to the amount of times the elevator button is hit. If so, his barrage of button pushes would have jolted all current passengers as the elevator began its deathly plunge toward the lobby.
2.) He thinks I’m an idiot. As if I don’t know the purpose of a call button and just wait there until an elevator randomly opens before I am able to get on. It makes me want to say, “Well lookey there! The BUTTON makes this here magical box work?!”