While staying in a cabin in Michigan, I neglected to empty an overfull garbage can from the kitchen.
When my wife arose that night at 3 AM, she screamed. The garbage can had been moved to block entry through the bathroom door.
No one could have come into the cabin that night and done that. I stared at the ceiling till dawn.
Not all spirits have physical bodies.
Bet you never forgot to take out the garbage again...did you ?