John came back from a safari in Africa. Upon arrival, he went to his friend Mark, and told him of his adventures. "I was out in the jungle," he said, "when all of a sudden I heard a noise in the bush behind me. Looking back, I saw a huge lion, licking his chops, and smiling at me. The lion started coming my way and I started running, with the lion not far behind. When the lion was almost at my neck, he suddenly slipped, and I got ahead a bit. The lion started gaining on me, and as he got closer, once again he slipped. I happened to see a house not far away, and made towards it. As I got close to the house, the lion was almost on top of me, when he slipped for a third time. With the very last bit of strength, I ran into the house and closed the door in the lion's face." "That's some story there, John, I would have messed my pants." "Well, WHAT DO YOU THINK THE LION KEPT SLIPPING ON...???"