Jeez! Does the elephant need to use the restroom?

At work we have this private stall. Marked as the handicapped restroom, it has a sink and a toilet surrounded by four walls. The door is automatic for anyone not able to open the heavy door on their own, and support rails are mounted next to the toilet. The size is about the same as my apartment, in fact it's kind of like a little apartment. So, naturally everyone wants to use it. Every once in a while I will be having a moment of zen, and suddenly it's as if a elephant hit the door. No, it doesn't bother me that someone else wants to use the bathroom. Who wouldn't?! The part that amazes me is that the person trying to open the door assumes that the door will open. There couldn't possibly be someone else that uses this public restroom. No testing the knob to see if it's locked. Instead they go full throttle against the door making this huge sound. I wouldn't be surprised if they break a shoulder. Then there is idiot type two. They hit the solid oak of a door, and surprise! It's occupied! Do they stop there? No, they try again at full blow a couple more times, then they punch the button to get the automatic door to register. Not just one push, but this frantic wood peck-er-ring action. Finally, acceptance, there must be someone in there! I've been there for five years, and this happens at least once a week. Actually, I'll take back the blame that it's an elephant. An elephant would remember.