^ Sounds like a load of crap to me. And, I even believe in the supernatural.
As far as your first story goes, it could have been any employee not in uniform that just happened to be drunk running around.
And, about your second story, did you actually see the camera footage of the alleged person that walked by and no one saw? I sincerely hope that you do not believe everything you hear. The security guard could have just been pulling your leg.