Trying to think of a particular scene, or rather what movie it's from (or fc skit).
This going to be very difficult in this medium, likme explaining a dream, but here goes:
Eric Idle interjecting into a conversation or simply interrupting whoever he's speaking to. Head cocked, starts to rattle off semi nonsensical list of "advertisement sounding" statements. They're all kind of a string, logically, and sound as they they've been lifted from a commercial, like some kind of endorsement. Obviously he's not allowing the other person to say anything, which if he would, would resolve whatever issue it is between them. It's a tactic he uses often, but is NOT the brave sir robin protestations, although it is a similar actor's trick.
if anybody can think of what this scene might be, what movie it's from it would save me from the absolutely horrible chore of going to the video store to rent each of the movies, lounging around watching fc on bbc etc...
no really, please tell me if you know. I think it might be Brian, I'll check there first.