Working in a small hospital on the night shift, the crew of 3 watched a patient in a hospital gown walk to the vending machine, buy chips and return to his room. Trouble is, there was no one in that room that night. A man had recently died there, of a heart problem. He had asked constantly for foods we couldn't give him, like potato chips. We searched the room, the hospital, checked all (locked) doors, did a head count about 3 times. (People had to ring a buzzer to get in at night.) There were 2 other things that repeatedly happened in that hospital, one of a cold wind or breeze in a certain remote spot, and another of a baby crying in an empty nursery room; both were a recurring experience for several employees, including me.
Also rented an old farm house that the old lady evidently still occupied -- we would see shadowy figures, and hear conversations and footsteps -- she seemed to like our presence; we tended to her bushes and shrubs that had been neglected for several years.
I have a few more, but those are the most striking, and they don't measure up to horsejody's chores getting done, anyway!
I suppose the boy's face could have been faked, though it would seem silly to me -- there is plenty of strange stuff going on out there -- we don't know it all. I'll bet many of those reading this thread choose not to tell their experiences.