Why, of why, would anyone be stupid enough to set up a live media lapel mike during an election campaign walk-about?
As he went to get into his car, Mr Brown told her: "Very nice to meet you, very nice to meet you."
But off camera, and not realising he still had a Sky News microphone pinned to his shirt, he was heard to tell an aide: "That was a disaster - they should never have put me with that woman. Whose idea was that? It's just ridiculous..."
Asked what she had said, he is heard to reply: "Ugh everything! She's just a sort of bigoted woman that said she used to be Labour. I mean it's just ridiculous. I don't know why Sue brought her up towards me."
Reminds Adolf of a particularly bumptious Presbyterian minister who had some unsavoury remarks to make in his office five minutes before morning worship. He forgot he was broadcasting.
But nothing can match this audible effart from Mr Obama's chief of staff.