Several times. Here's one: My first wife and I always threw massive Hallowe'en parties. It was getting late and someone told us a story of a haunted bridge and cemetery nearby. About a 15mins drive. This is in between Ann Arbor and Detroit, Michigan USA. We chose the cemetery. Story went, if you drove at a certain speed on the road thru the graveyard, you would hear banging on the roof of your car. Supposed to be a little boy who got hit by a car. The banging is him begging you to slow down. Important side note: At this period, I was really into smiley faces. So, 2 cars. We're in the 2nd. Our driver didn't want to risk speeding as, in Michigan in October, it's snowy. She didn't want to wreck her car. Of course, I'm bummed but I understand. I'm sitting on the driver's side in the back, my wife in the middle and person x on the passenger side, person y in the front passenger seat. We see our friends go over into a ditch. As we pull close to them to see if they were okay, everyone is getting out. I go to get out and I see on the OUTSIDE of the car on the window I see a smiley face DRAWN on the window! It was all squiggly looking as if a child had drawn it! I'm trying to show my wife as she trying to hurry me out the car. She sees it and realizes why I wasn't getting out. That was just freaky.
