The Simpsons creator Matt Groening upset his dad when he made cartoon mum Marge carry a deflated tyre miles in an episode of the hit series.
Groening's dad, who shares his name with The Simpsons' clueless father Homer, has no problems with many of his namesake's questionable acts - but he took exception to one storyline.
The animator explains, "The only thing that offended him was the time the Simpsons' car broke down in the desert, and Homer made Marge carry the deflated tyre back to town while he waited behind.
"My dad said Homer shouldn't have done that. He was very perturbed by it.
"I said, 'But he strangles his kids! You aren't bothered by that.'"