[This makes him grin, and he almost looks proud at how embarrassed Colin is. He decides to follow him closely, snickering at the way his speech patterns changed now that he's flustered.]

Hrmmm... I think I want coffee. Or rocky road. Maybe both. I wonder if there's some kind of rainbow flavor. [He pauses.] Maybe I'll just not get anything and steal bits of yours.

[Yes he did do that just to fluster Colin. And now he's whistling innocently.]