"Fine," he says to Dean's 'relax.'

SAM CAN TOTALLY RELAX, DEAN. LOOK AT HIM. RELAXING. With his jaw slightly clenched and his hands braced on his knees, shoulders stiffened.

Sam glances over at Buffy apologetically.

It would be hard to explain that this is Dean actually behaving well right now, and there are points for effort there. He's going to keep flipping through their dad's journal, and he won't interrupt Buffy's answer, whether it's the long version or the short one.