“Jumping the shark” is a term describing the moment a creative work, most often a TV show, reaches a point of irreversible decline in quality, often marked by ridiculous or implausible plotlines, as an attempt to regain viewership after exhausting its initial premise. The phrase originates from a 1977 episode of the sitcom Happy Days where the character Fonzie (Henry Winkler) literally water-skied over a shark.

For me, Arya Stark jumped the shark, more specifically, jumped out of the darkness and performed an impossible feat within the framework of the fiction.