He came back around, fast and hard and climbing to his feet quickly, with a low, feral growl. He was pissed the fuck off, he was scared, and he was trapped somewhere with multiple versions of the Master.
Who kept shooting him and by DAMN if he had reason to think there was danger to others, his reaction was going to be to find a way to kill first and worry about the consequences later. The truth was, quite simply, that he didn't have much choice.