Entertainment 5 things you didn't know about when 'Happy Days' jumped that shark Part of the reason "Happy Days" jumped the shark was that Henry Winkler -- aka The Fonz" -- was an avid water-skier. Photo Credit: IMDB.com By ANDY EDELSTEIN email@example.com July 5, 2015 7:57 AM Print Share fbShare Tweet gShare Email With Discovery's "Shark Week" and NatGeo Wild's "SharkFest" both beginning July 5, we thought we'd clue you in to five things you might want to know about one of TV's most-fintastic moments: the "Happy Days" episode that spawned the phrase "jump the shark" (or when a show began going downhill): 1. The episode, which was part of a three-episode arc set in Hollywood, aired on Sept. 20, 1977. 2. It ranked No. 3 for the week and garnered a 50-plus share (which would be unheard of today), an audience of more than 30 million viewers. 3. The phrase "jump the shark" was inspired by a scene in which Fonzie (Henry Winkler) water-skied over a shark. 4. In real life Winkler was an avid water-skier. (He had actually been an instructor.) His father suggested that his son's skills be used in a "Happy Days" episode. 5. "Happy Days" really didn't jump the shark after this episode aired. The show remained on the air for six more seasons (164 more episodes) and ranked in the Nielsen top 25 for five of those six seasons. By ANDY EDELSTEIN firstname.lastname@example.org Andy Edelstein, Newsday's entertainment editor, supervises coverage of TV, celebrities, movies and pop music. He has written three books on popular culture, including "The Brady Bunch Book." Share on Facebook Share on Twitter Comments Comments section is temporarily on hold. Here’s why.