Jean doesn't quite startle him, but her presence causes him to watch carefully, eyes narrowed. She may have proved she'd meant no harm, but Dean is a paranoid bugger, and besides, Sam was sick. And of course, he opens his eyes just in time for Sam to pull him forward, and Dean grunts.

"She's a hot chick," Dean mutters back, top tired to squirm away or say anything else. "Maybe if you're real nice, she'll give you a Scooby Snack."

What, he's tired. He doesn't have to make sense.