Martin wrinkles his nose in displeasure at that wink, leaning back a bit. He doesn't like the way that sounds, just shy of a threat, really—and he especially doesn't like the way Sweeney is grinning at him. If his idea of a leprechaun is so at odds with the man before him, there's no reason his idea of 'luck' would be either. This might be an ideal time to change the subject, but before he can think of anything, John's already launched into a counterpoint.

Martin doesn't quite turn to stare at John, though his eyes go wide and a bit unfocused as he takes in what sounds like a bloody challenge. Christ, really? Even if the good luck really is limited to those examples, it doesn't necessarily follow that the bad won't be worse. Even if it is as unimpressive as John believes, Martin sees no reason to poke that particular bear.

But for all that John is brilliant, he hasn't always been smart, self-preservation never particularly high on his priority list. Martin shuts his eyes and heaves a quiet, put-upon sigh.