This crap happens. Small house I used to live in; There was regularly foot steps, and things getting knocked over. TV going on and off, that kind of thing. Multiple people that came over, heard it no one could come up with anything to explain the footsteps that could be heard at least weekly. One night though... Over the course of about 7 seconds I felt a large person I couldnt see climb in bed with me, roll over, and start flipping out like I scared the shit out of them. I got kicked, slapped, the covers torn half way off the bed, then he jumped out of the bed and it was over.