Jack spat his load into the faces of Dustin's teammates. He was mad. He could feel his anger rising up Dustin's body, taking control. In memory of a movie he had seen once, he thought 'there can only be one' and the large penis next to him dropped off onto the ground, much to the teammates' horror. They stared at the useless detached sausage lying on the ground, water flowing around it.
Jack began to grow. As a penis, he was now nearly 6 feet long, his balls rested on the ground. Dustin, still connected, was straddling the nearly two-foot-wide cock with his legs. He was thrown off his feet onto his back by the sudden size change. He was temporarily unconscious. He shrunk.
His teammates saw a gigantic penis, now equipped with a vaguely familiar face beneath the head, and veiny arms were at its sides. Their old buddy, Dustin was a tiny 5 inch flaccid human being, dangling upside down, attached between his legs to the giant penis. It was almost a role reversal. The penis was now the man and the man the penis, though they still retained their original forms. A moment later they forgot who Dustin was and thought that this was perfectly normal, and that they had known Jack forever.