What's one of the coolest/strangest/grossest/ etc. things you've ever seen but never got the chance to take a picture of?

Me, I was in a campground bathroom somewhere in Maine, and in one of the stalls there was a large patch of paint missing from the wall (about a foot wide all the way around) and in the middle, someone had written "Please stop peeling the paint." Seems fairly normal, but at the time I thought it was amusing.