A friend of mine tells a story that's about as close as real life gets to this kind of language trick. He was helping a friend in college study for her Test of

A friend of mine tells a story that's about as close as real life gets to this kind of language trick. He was helping a friend in college study for her Test of English as a Foreign Language. She was working on past tenses and, sincerely attempting to explain a mistake she'd made, he told her: "If you had had 'had' here, you would have had to have had 'had' there as well." Whereupon she screamed.