Part of Stiles is really glad that Allison didn't have her bow with her. It meant the rocks were a little painful, but arrows would have been worse. "Hey, some of us haven't done anything hugely wolf like in the past few years. Cut me some slack."
Stiles took off again when she told him to run and sure enough, one of the rocks caught him. This time in the low back though. He growled under his breath. "That was cruel!"