Thanks for a great reply! Looking at the original episode of "Happy Days," I find it difficult to believe that the producers were not keenly aware that they ha

Thanks for a great reply! Looking at the original episode of "Happy Days," I find it difficult to believe that the producers were not keenly aware that they had walked away from the show's concept and were now milking cheap popularity for all it was worth. I suspect that the definition you give and the one I use are compatible even though they differ. Under the definition you give, the defining moment is really set by the viewer. It's the instant you know it's all downhill from here, not the actual peak. So Gruber's phrase might be the defining moment for Hank. It's also possible, as was the case for Happy Days, that the producers turn cynical and start resorting to cheap tricks like throwing out all character development and turning the show into a parody of itself, focusing on a caricature minor character rather than the more well-rounded principals. That's the definition I prefer. They could go together, and I would say there's value in combining them, as in: "I realized that HN had Jumped the Shark when Paul introduced the Date-a-Hacker feature."