"Rickles snipes again"
RICKLES: "Nothing, Nothing!!! But I was just thinking, why don't we play horse? I'll be the head and you just be yourself." (snicker, snicker)
YOU: (Pause, take a quiet deep breath) "Rickles, I hear you say, 'Why don't we play horse.' When you say that, what are you really trying to say?"
(At this point the Marketing Director is glaring at Rickles, as are other people in the room. Even Rickles' usual ally who is sitting next to him is now looking away and trying to signal others that he is no longer a supporter. Rickles squirms uncomfortably but says nothing.)
YOU: As I was saying...
R&R: By being calm and professional, you have cut the Sniper off from his ally and created a contrast between his inappropriate childish behavior and your professional behavior. Congratulations! At this point you can return to making your presentation.
YOU:
R&R: Make sure you try the Relevancy Challenge. This is a very important strategy.