the neighborhood kids

Have the neighborhood kids ever played the trick on you where they knock on your door and then disappear? Well they have to me. So you can perhaps relate to my reaction when, several years ago while I was busy eating dinner, I heard a knock at the door.

Upon answering the door, I didn't see anything, and was about to give up in disgust until I looked down. There at the bottom of my doorstep was a tiny little snail, obviously left there by kids. Having better things to do with my time besides tend to snails, I picked it up and threw it as far as I could.

Three years later I was eating dinner again when someone knocked at the door. Upon answering it I didn't see anything... until I looked down, and there stood the snail.

The snail looked up at me and said, "What was that for?"