Though Laura hasn't been rendered completely unrecognizable by blood, there's still a second when she's heading toward him that his instincts jump and yammer to blast fire at her too. It's the sort of twitchiness that's saved him a few times already, but he manages not to set his best chance of staying alive on fire.

He's still trying to melt the head, but he's never actually encountered anything that has resisted this long, and he's starting to get that weird sort of hollow, burnt feeling inside already. It doesn't hurt him or affect his abilities, and as far as he knows it's not even an indicator he should stop or there'll be consequences. It's just weird.

If John were thinking better, or less afraid of Laura, he might ask her why she stopped attacking it, as he can barely hear the high pitch himself. But he's not and he is, so he just looks at her for direction.