Neat use-case, though the sword literally telescopically inverts itself at the beginning of the scene like a light saber where you would have expected it to be drawn from its scabbard.

I'd be interested to see how Wan 2.2 First/Last frame handles those images though...

That is an interesting error actually. It happened because both orientations of the sword are visually plausible, but not abrupt transitions from one to the other; there needs to be physical continuity.

Here is a reproduction of the Matrix bullet time shot with and without pose guidance to illustrate the problem: https://youtu.be/iq5JaG53dho?t=1125

yeah sadly veo 3.1 has not caught up to the image generation capabilities. May be we need to work on how to make video generation more physically consistent. but the image generation results from banana pro are great.