The original reference is "Jumping the Shark". It comes from the TV show "Happy Days" where the tough, biker-hood type that personified what it was to be cool was pushed into using water skis to jump over a pen full of sharks. It is considered the point of no return in the decline of that series. It's also become the term used to describe that one moment in any series when it became too stupid to watch.

The shark ramp is that device that facilitates the jump.

There is now a similar term for films. "Nuking the Fridge". It's a reference to the Last Indiana Jones movie.

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I'm not evil.
An evil person would do the things I think up.