I saw that too. I looked at it frame by frame and it is whipping A LOT! Even though all longswords are supposed to flex some the Talhoffer is pretty stout. I did bend it a bit on something a few years ago, but I don't think that distortion is contributing to this whip since you can see the blade whipping the other direction on the recovery. Is this a bad thing? Does it show that my edge alignment is way off?
"Is this legal?"
"I dunno, it's fun though."