A guy is sitting on his sofa when he hears a knock at the door. He opens the door and sees a snail on the porch. He picks up the snail and THROWS it as far as he can.
Three years later — the same guy hears a knock at the door. He opens it and the snail says, “What was that all about?”
I love this joke because, if you’re like me, you identify with the snail’s perseverance in the face of inexplicable setbacks . . .