Pet peeve #7,642: Just because that door has a button to push to make it open automatically doesn't mean that you should push that button and make the door open automatically. Do you see the little icon underneath it? That button is for folks who can't open that door on their own. "Disabled" people, as it were. Here's the thing about machines: The more they're used, the more maintenance they require and the more likely they are to BREAK. Therefore, the more pedestrians use that button, the more likely it is not to be available for somebody who might actually NEED it. So take your little arm and grab the little handle and PULL.