After-Dinner Conversation

Buzz: ...and Mum, you get these two things here and they turn into guns ...

Me: Mm, wow.  (Bending down to closely inspect Buzz's face,) Umm - why don't you go and check your face in the bathroom mirror, and then -er- fix it.

Buzz: Why?

Me:  Well, I wouldn't like to spoil the -um- surprise, but I think that if you were a Batman villian, you'd be called "Pesto Face."

Buzz: Oh.  Okay.