From 'Jaws' to 'Jabberjaw': 25 memorable sharks from pop culture

Yep, this is where the term "jump the shark" comes from. When a show is said to have "jumped the shark," it usually marks the moment when it's on the decline -- often at this point resorting to gimmicks, which is exactly what happened on "Happy Days" when Fonzie literally jumped over a shark while waterskiing in his leather jacket.