His arm rides up the wooden arch of the bow and he hisses quietly at the sharp sting, but smirks as his free hand comes around and closes around the lower half of it. He spins in place, ducking under his own arm and twisting the bow around in Katniss' hand, trying to loosen her grip on it. The hand with the blade in it has been stopped, but if she's not focused on his feet as well, she'll find one hooked behind her knee and kicking it out from under her, not so much as a strike, just a move to unbalance her.