Well, trying to bodily put himself between her and the kids didn't work. Jamie turns and starts to run towards Vega and the old woman. He's only got a moment after Vega and Ellen fire to make a decision - try and knock Vega out of the way, or attack the old woman herself. The crab-spider-thing Roxie throws is what decides him.

He murmurs a brief prayer, then there is a much louder yell as he flings himself after the old woman, sword flashing through the air.

"CREAG AN TUIRE!"