How the hell was he supposed to calm down? There was a dangerous man inside his head that kept him from sleeping! He should not calm down! In fact, he should wind up! He should be more upset! But he managed to calm down slightly anyway, if only to appease her.
"Yeah, I do," he muttered. "I'll have some of that..." His sleep schedule was really taking a toll on him, but he had to press on. He had to keep going.