TV Shows: 'The patron saint of shark-jumping'

The reasons for a show jumping the shark are categorized as shown above. These come from the original JumpTheShark.com site (now a TV Guide blog).

When I chanced upon JTS years ago, it was hilarious to note this: Ted McGinley is a category by himself! Recall him from 'Revenge of the Nerds' - the leader of the jocks? The patron saint of shark-jumping - apparently, any show experiences a fall in ratings after Ted shows up on it, leading to its eventual cancellation.

Jump the Shark: 'In a television show, to include an over-the-top scene or plot twist that is indicative either of an irreversible decline in the show's quality or of a desperate bid to stem the show's declining ratings. '