On a British cruise ship, there is a betting pool wherein passengers try to correctly guess the number of miles the ship will travel that day, within ten miles above ("high field") or below ("low field") the captain's own guess.
On a stormy day, a passenger named William Botibol bids £200 on "low field", the inclement weather having significantly slowed down the ship. He is gambling largely with money he does not have (it represents years of his and his wife's savings), but he views it as worth the risk.
The next morning, Botibol wakes up to find the sky is clear and the ship is moving very fast to make up for lost time. Horrified, he decides that to slow down the ship he will jump overboard, dressed as if for tennis so he can easily swim. This way, the ship will have to stop and turn around to rescue him.
Seeking out potential eyewitnesses, Botibol ventures to the rear of the ship where he encounters an elderly woman. After striking up a casual conversation to ensure that she notices him and will raise the alarm when he falls into the water, he then surreptitiously leaps off the end of the ship. Yelling for help as he plunges into the water beneath him, he captures the woman's attention. Initially, she seems unsure how to react, but she eventually relaxes and watches as Botibol, arms waving madly and shouting, disappears into the distance.
A matronly woman, evidently a caregiver, soon arrives on the deck and reprimands the older woman for wandering off without her. The older woman does not reply directly but instead comments offhandedly about a man who "dived overboard... with all his clothes on" – a remark that earns a stern "Nonsense!" from the caregiver. The elderly woman – who, unbeknownst to Botibol, is evidently a dementia patient – allows the caregiver to lead her away across the deck, saying "Such a nice man. He waved to me."[1]
^Although a later Dahl story, Mr. Botibol, also features a protagonist with the same surname, the two stories are otherwise unconnected. Nevertheless, when the two stories were adapted for Tales of the Unexpected, the same actor (Jack Weston) was cast as Botibol in both episodes.