I've never really had anything live under my bed, since I've never had a under the bed. But growing up in our single story home in Puerto Rico, my bed was next to the windows, which were covered by plastic vertical blinds. Two of the blinds had fallen off and were never replaced, leaving a clear view of the dark small alley in our yard. I would always wake up in the middle of the night and stare into the sliver of window space dreading to see something or someone staring back at me. We had a lot of burglars and stories of chupacabras running around during my childhood, which didn't help ease my nerves.