A Ghost Story.
When I was a kid, one night I thought I had a ghost in my room. I heard a scratch-scratch-scratch sound coming from my closet that would stop for several minutes and then start again several minutes later.
After what seemed like an eternity, I turned on the lights and looked at my 'ghost'. It was a plain old balloon, bouncing around on the heater vent in the corner of my bedroom. It was scary for me at the time. But once I found the balloon, it was the last time I was worried about ghosts.