OK, guys, in the interests of full disclosure, I worked for Nestle in a previous incarnation and saw the reel of all the historic Quik commercials one afternoon. However, that was 27 years ago, and so I think this bit of trivia qualifies as "from the actual vault".
stevez and Cathy2 : Indeed, there was a musical signature played by a trombone. But I am talking about a sound effect that occurred at the VERY END, after the trombone bit.
[Musical theme from Double Jeopardy plays. . . while I wait for your anwers]
Man : I can't understand how a poet like you can eat that stuff.
T. S. Eliot: Ah, but you're not a poet.