At a time like this, a shot or two might not feel so terrible, although Marcus hasn't been drinking because Dan can't drink. So feeling giddy or little drunk for a moment is actually kind of appealing and he smiles faintly at Nick's words.

"Go ahead," he says. "Even an ex-priest like me can hold his liquor."

Moments in which he feels like he can make a joke are few and far between right now, but he can't help himself. It's better to lighten the mood at least a little when he can. Even if the mood doesn't feel terribly light at all.