
One dude choking up on a sword, I guess gripping the ricasso, to get better control (a half-sword grip?) vs. someone who's inverted the blade to try and brain their opponent in the style of "Mordhau/Mordschlag/Mordstreich" ("murder-strike / murder-impact / murder-caper" in German? If wrong, blame Wikipedia) As a DM my first instinct'd be "that is ridiculous", but then you see a cool engraving and say "I'll be damned, that's not just a crazy player trying to sucker me into subduing /KO'ing an NPC with their greatsword."
PS, the guy doing the murder-strike in the picture looks a little light in the sabatons. Probably French.