There is something that has been bugging the hell out of me. We have a lecture hall at our university, it has 4 doors. At the front, there is a main door, theres one at the side, and 2 at the back facing opposite directions. Now on some days, this one back door is absolutely impossible to keep close (its little hinges thing doesnt work i guess). You can pull it closed as hard as you can and you can maybe close it (as in bring the door all the way in) but you can't keep it close. So during class, it's just kinda swinging a little bit. Now the insane part is that if someone opens the side door which is like 30 feet away, the back door closes completely by itself. When the side door closes however, it opens up again in the back. The lecture hall is fairly large so there can't be some pressure related phenomenon going on... i highly doubt they're connected... My theory: Ghosts. What is yours? What the heck is going on here? And better yet, why am i the only one finding this outrageously confusing in my class?