The Ghost of Denfeld's Auditorium
Some say a teacher was on the balcony of the auditorium and fell to his death. They say he's still around and will makes noise and mess with stuff off stage.
There are also rumors that some kids committed suicide under the stage.
I graduated in '09 and I will admit, it gets a little creepy in that auditorium. I've never personally experienced anything, but the one time I went below the stage I had that eerie feeling I was being watched. Never went down there again.
In the first clip on the video below, if you look on the right side it almost looks as if someone is standing there.