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A young Technician and his General Manager board a train heading on its way to Scotland. They can find no place to sit except for two seats right across the aisle from a young woman and her grandmother. After a while, it is obvious that the young woman and the young tech are interested in each because they are giving each other "looks." Soon the train passes into a tunnel and it is pitch black. There is a sound of the smack of a kiss followed by the sound of the smack of a slap. When the train emerges from the tunnel, the four sit there without saying a word. The grandmother is thinking to herself: "It was very brash for that young man to kiss my granddaughter, but I'm glad she slapped him." The General manager is sitting there thinking: "I didn't know the young tech was brave enough to kiss the girl, but I sure wish she hadn't missed him when she slapped and hit me!" The young woman was sitting and thinking: "I'm glad the guy kissed me, but I wish my grandmother had not slapped him!" The young tech sat there with a satisfied smile on his face. He thought to himself: "Life at is good. How often does a guy have the chance to kiss a beautiful girl and slap his General manager all at the same time!!!!!A Kiss and A Slap.
Oh dear, Jem! This one was doing the rounds at the relief of Mafeking. (Out of curiosity I Googled for 'train tunnel kiss slap' and found about 2,860,000 results, no less.) But I'm glad to see its popularity hasn't diminished after all these years! ;-)