Insane adjective – Having or showing a very abnormal or sick state of mind. Yo-yo and insane are semantically related. In some cases you can use "Yo-yo" instead an adjective "Insane". Nearby Words: insanity, insanely
What really earns this series extra yo-yo points is that Season 2 keeps Season 1's intro dialogue, where John says he's being "hunted by an insane military commander" — and that's still accurate, it's just a different military commander now!