I've been shying away from the tag because it feels uncomfortably self-promoty to me (I've got nothing against anyone else using it though).

I'll do it this time.

Also, yes, this is essentially one of those scenes in a kung fu movie where the protagonist has a conflict with some old man who turns out to be some kind of master that schools him in some unstoppable, esoteric kung fu style.

Except sifu is a rapey prison dwarf in this case.