DJ humour

I exploited my connections with BBC Radio Cambs this morning to give Impromime a good ol' plugging. Their fine breakfast DJ Steve Riches probed me about the nature of the show and how on earth we could make it up on the spot, and at one point our exchange developed thus:

Steve: So it's entirely made up on the spot?
Me: Yes, it is.
Steve: Oh no it isn't!
Me: Oh yes it is!

Clearly he's a natural and ought to be included in the show forthwith.