Before I was born, right after they were married, my mother and father attended the world's fair. My father was interested in taking photographs, and my mother didn't want to follow him all over the fair. It was also very crowded and hot, so she looked for a shady, out-of-the-way spot to wait for him to come back to find her. She was just standing there, minding her own business, when someone tapped her on the shoulder.
"Pardon me, ma'am, but what are we in line for?"
When she looked behind her, she had a huge long line standing there expectantly waiting.
I think that was the same trip where she spotted the kid eating an ice cream cone. He tried to take a huge bite out of the ice cream, but he knocked it out of the cone and onto the ground.
Nonchalontly, he reached down, picked up the ice cream from the sidewalk, and put it back on top of the cone.
Mom heard the kid declare "Oops. There it goes again!" as he walked away, happily eating his ice cream cone.
My buddy and I would go to the art gallery and stand in front of blank, white walls, observing intently at something that wasn't there. Sure enough, some people would come and stand behind us and observe, too. The art gallery crowd is a little different than the theme park crowd, so rather than ask us what we could possibly be looking at, they'd continue to watch the wall, thinking that "we'll get it, eventually".