Lofty Steele?

I am just rewatching this episode and noticed something wonderful. At the point in the show just before they decide to go break into the loft, as Steele, Laura, and Mildred are sitting on the desk, they have a moment where they are striking the poses for "hear no evil, speak no evil, see no evil". It's hilarious! And clearly intentional. I wonder who came up with that one?