Kitty is suddenly the only living thing in attacking range, and she isn't a thing that needs to be attacked. Clarity returns and it brings some confusion and dismay along with it. He's usually more cognizant during fights. Even when he does lose control, it's a loss of control that he allows and even enjoys, not one that sneaks up on him.

Now is not a time to think, though. They were going to go back to the others, weren't they?

Doing that is easier than saying anything. It's a repeat of their sparring incident on a larger scale.