I had marvelous, hilarious experience once with a Marty Feldman comic sketch called "Opera without Music".  It absolutely took the mickey out of opera ferociously, it was wonderful!  It's probably online, a lot of Feldman's sketches are, just look up Marty Feldman Opera without Music, and the two Ronnies used to send up classical music shamelessly, and there's that very famous Spike Milligan sketch about virtuoso pianists...and they're all done with very famous miusic and opera.  Have a look at them @greenpea.