A clear intent to forfeit would be to tap the floor with his hand, that's what people being choked would do.
At this point I don't care how he gets his resolve back, I just want that bastard dead asap.
Edit: So far nothing wrong but I see people jumping like hyenas to the raws... don't spoil the fun please, even something like "Well you'll be surprised to see what X does next!!" is enough to piss some people off.