I was at a friends house for the night, she had invited me over to stay with her because her boyfriend was out of town. At around 2 am (i had long since been asleep on the couch) the bathroom lights turned on and the shower started. Assuming it was my friend i tried to roll over and go back to sleep. She came out of her bedroom to check on me. We walked into the bathroom together to find no-one there. I turned off the shower and the light and returned to the couch.

After about half an hour of tossing and turning the same thing happened again, and again we found nothing in the bathroom. Of course this time we both left the apartment immediately. She moved out 2 weeks later.

Has anyone experienced anything like this before?