I posit that the Big Bang, from the point of quark formation at 10^-17 seconds, and every thing that happened afterwards, was jumping the shark. This means all events in all dimensions, in all possible timelines.
I therefore conclude that claiming things as "jumping the shark" is redundant. Maybe we can instead go back to pointlessly spouting quotes from the Simpsons.
Brett "Your ideas are intriguing to me, and I wish to subscribe to your newsletter" Buck