[He appears to take Doyle's jab in good stride, offering a closed, patient smile in return.]

Nor are you as clever as you think yourself. [A beat.]

Ah... that reminds me... [Petering off, he flips his trident blades-downward, and thrusts it deep into the rain-softened ground, inches away from the man. A very carefully calculated move, for all its ferocity. And as if it were nothing at all, he continues calmly without so much as blinking:]

I noticed you have yet to pay your debt. [Tilting his head with mock-concern, his voice devoid of viciousness. In fact, it's quite conversational in tone.] Now why is that, I wonder? ...Been terribly busy, have you? Hmn~?

[Well, go on - he's inviting you to make up an excuse because he's a dick.]