The creature surely seemed intimidated by the sudden weapon, and didn't draw its own weapon. 'They attack in groups then' The Doctor thought to himself as he walked away slowly with Handy.

Once out of harm's way he couldn't help shooting the other man a look. Or, well, the knife. "Look, no stabbing here okay? While I'm around, we won't kill anyone if we can help it." His voice was stern. "They'll get even angrier if they see we ended up killing one of their own. The moral high ground is ours if we don't do anything!"