She drops to all fours and tries to pick up a little speed while also glancing back at Andrew, which turns out to be a mistake. It means she's not paying close enough attention to the knife, and she accidentally cuts her own forearm. Yelping, she drops the weapon and backs away from it in fear and suspicion, as if it's gained a life of its own. Then she crouches by the fence, the knife on one side and the Andrews on the other.

She's reluctant to pick up the knife again, but she has just enough sense to know she shouldn't let either of them near it, either. Lifting her injured arm, she sniffs at the wound - which isn't much more than a graze - and begins to lick it clean, her gaze still darting between the two Andrews.