The fastest man in the world

I was looking through an old sketch book from 1995, and I found this story I had written. I don't remember what inspired it, if anything. But here it is. I reproduce it here exactly, although there are some mistakes in it, mainly that the tense keeps jumping from the past to the present, and the phrase "the fastest man in the world" is repeated quite a lot.

The Fastest Man in the World

The fastest man in the world got shipwrecked on an island in the remotest part of the sea. There is only one man living on the island. The fastest man in the world tells him he is the fastest man in the world.
The man who lives on the island tells the fastest man in the world that he loves to run along the beach, and he challenges the fastest man in the world to a race. The fastest man in the world agrees.
The race begins, and the fastest man in the world is surprised to see the man who lives on the island take off into an early lead. The fastest man in the world is in top condition and running the fastest he has ever run.
He summoned all his strength and energy and his feet kicked up huge sprays of sand behind him as he tore along the strand. But at the end of the race the man who lives on the island has extended his lead and wins easily. From then on the fastest man in the world was no longer the fastest man in the world.
He was the slowest man on the island.