"Oh, um..." Darren suddenly seems extremely nervous. "I've never really used one before and I'm not much of a fighter, plus if you get hurt somehow by accident it would be my fault and you won't want to be my friend." Darren nervously twiddled his thumbs and tried not to look at Roxy or the knife. He had never liked fighting but the thought of fighting someone he thought of as a friend, even if they had only just met, was worse.