Still from the 1960's show, "Beyond The Fringe." I found youtube videos of this exceedingly talented man doing parodies of Britten, Faure, and Schubert as well. :) I don't know which astounds me more... Moore's skill or the audience's being exceedingly well-versed in music, enough to "get" the humor. :)
In this video, Dudley Moore takes the theme of the whistle tune from THE BRIDGE ON THE RIVER KWAI and transforms it into a piano parody in the compositional style of Beethoven.