"Flatterer. But good. Congrats, you're one step up on the street punks I used to know. Some soldiers, too.

"And to cement that thought of yours, we're going to have a little object lesson. Watch closely." Duo pauses to make sure he has her full attention.

Then he takes Mary's knife in his right hand and drags it carefully down in a line across his left forearm. It draws some blood, and it sure stings, but it won't need stitches. He's an expert, after all.