[That was surprisingly astute, and it brings Wash up short. He needs to remember that, for all his suicidal tendencies, Casey can be smarter than he looks sometimes.]

I meant his confidence in battle. He's so worried about how he shouldn't be messing with magic that he doesn't realize he's good at it. Rose made it pretty clear she doesn't think he can handle himself, and if he believes that...

[He trails off and shrugs. They've both seen the results of that line of thinking.]