I have had what you may consider a scary encounter and my brother saw the same thing although at a different time, weird shape in a mirror in my grandmas old house. Not sure how you explain it because it was definatly not reflecting anything that was there, but I am sure there will be something logical I haven't thought of. I am not saying ghosts don't freak me out, but then I am freaked out by windows at night times, shadows, zombies, monsters hiding under the bed, the little boy from identy....the list goes on!