This happened some years ago in senior year of undergrad. We had just moved to an apartment off campus. It was around eleven at night. Had gone to bed terrified after watching a horror movie. I got up to pee. Was walking towards the bathroom and saw a figure in front of me. I screamed in fright, woke up my apartment mate. She agreed to investigate. Walking towards the bathroom I found out the hall mirror was reflecting my image. I was too ashamed to tell her that and told apartment mate that the ghost must have disappeared.