Ghosts?

Just in case there's someone who is thinking of the silliness of the floating sheet variety, I'd like to clarify that I interpreted "ghosts" as any being that is among us but not seen (and I don't mean underground or hiding in the closet).

hasn't anyone seen Ghost Hunters? i would also like to throw in Poltergeist as irrefutable proof.

if you selected 'yes, i have seen one and can tell the tale' please tell us the tale. i want to know about ghosts!

I'm not saying it was a ghost, but I can't explain it. One time I was in my bedroom in my apartment with a college friend I looked up and thought I saw my roomy standing in my adjoining bathroom (a tall thin girl with dark hair) and thought to myself why is she in my bathroom? I thought she was in her room! When I looked back she was gone. When I looked at my friend who was in the room with me he looked at me and said, did you just see someone standing in the bathroom? My roommate was indeed in her room to which there was no adjoining door from my bathroom. CRREEEEEEPPYYYY