[ Kitty should be worried, partially because Reid very much takes responsibility for what happened last night. Deanna warned him, he knew something was up, he talked to Nathan earlier that day and he still didn't do anything to prevent it from happening.
He really can't help anyone anymore, can he?
So instead of responding, he withdraws to the role of a silent spectator for the time being. Let's Kitty deal with the possibility of restraints. It was her idea, anyway. ]