Ankh finally has to let go of Eiji's mouth when he ends up grabbing the driver, trying to get that back. He hasn't let Eiji keep any Medals, either, so he's not sure what the other plans to do with that even now that he has it, but he's not taking chances.

He doesn't let go, and actually when Eiji does succeed in knocking Ankh a bit off balance, he only grips harder in an attempt to keep himself upright. But with Eiji struggling and Ankh focused more heavily on the driver, it's only a matter of time before his grip ends up loosening enough to give Eiji an opening.