I work at a movie theater, and all the employees talk about how one of the theaters is haunted, namely one that is all the way down a hallway, kind of isolated. We all hate having to clean it, since it's easily the most isolated place in the complex.
This story isn't about that theater in particular though. One day I was the usher, I had the clean the bathrooms at about 11:00 PM. I go to the women's bathroom, checking to make sure no one is inside first. I do a clean check, but one of the bathroom doors is slightly vibrating. I get freaked out and leave, as I'm leaving I look back, and see through the mirror that the vibrating door is slowly opening.
That was really my only slightly paranormal experience. And I could've easily been imagining it since I was stressed/nervous