Sleep paralysis sucks. For years, I had episodes in which I would wake up and hear footsteps and people speaking in the hallway outside my room, which is not something you want to hear when you live alone. I'd even hear them taking a pee and washing their hands in the hall bathroom. The footsteps would get closer and closer to my door, and I'd lie there thinking "I've got to get up THIS MINUTE, I'll open the window and climb out"--and of course I couldn't move. Then I'd wake up for real.

Almost as creepy: when I switched rooms, it never happened again.