When I was on the way home from a holiday in France when I was around 12/13 we had to stay the night in Calais because the ferry had stopped running overnight. The bed I was sleeping in was facing the door to our campervan and at about 4am the door started making noises as if someone was trying to open it, this woke me up. I was so scared I could barely move, when the door opened there was a shortish man standing there just staring at me. He seemed to be there for ages but it was probably only about 5/6 seconds. That's when my dad jumped out of bed and ran at the door and the guy just ran. Not the best story on here but definitely the creepiest thing that's ever happened to me.