My son just reminded me of a something that happened in his bedroom a few months back. Brandon (22) was up late 2 AM, playing WoW and heard what he said sounded like someone tapping their foot on the floor next to him. He got up thinking it was me because he sometimes get a little too
involved in the action. I was sound asleep in the recliner where I spend quite a few nights after my last surgery.

He then looked around the house and didn't see or hear anything or anyone and went back to his game turning his headphones up to drown out the tapping

The next day the same thing again but this time it was next to his bed while he was sleeping. He got up again looked around and nothing. The next morning he asked if I had been up because he heard FOOT STEPS in the hallway right after the tapping. This part I just found out a little while ago~~~~he said that he still hears the tapping during the night and has the feeling like someone is watching him!

His solution he rolls over toward the wall and goes back to sleep