Upnor needed that leg to take his weight as he moved backwards, and thus had no choice but to fall down, even as Bob was getting his own knees under him. Upnor knew that to fall on his stomach was death, so he spun and landed on his arse and rolled up onto his back, his legs going straight up in the air. If this were a Parisian Salle d’Armes he might have turned it into a backwards somersault and come up fighting, but this was nearly impossible in a stiff cuirass. So Upnor’s legs and arse reached apogee and then came down again. He was going to come up forwards. He planted his right elbow to push off against the ground but kept his guard up with the left, keeping that dagger pointed in the air. Bob had now got up on one knee and managed to take a swing at it. He fully intended to take Upnor’s hand off at the wrist, but either his aim was bad or Upnor reacted with exceptional speed, because instead the blow struck the dagger’s handle just behind the guard, right where Upnor’s thumb and index finger gripped it, and ripped it loose from Upnor’s hand. It whirred off and vanished in gloom and mist.