I was walking through the forest one day when my foot was rudely blocked by a large something-or-another. The large something or another turned out to be a rock. I went sprawling onto the ground and, by the force of my foot, it went skipping out in front of me. Dazed, I stood up, brushed myself off, and looked at the object I had collided with. I apologized profusely, and it said nothing.