Possibly The Funniest Ad-Lib of All Time
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The Carol Burnett Show was, without a doubt, one of the funniest shows to ever grace the airwaves. The assembled talent in that cast had no weak links.
One night, during taping, Tim Conway decided to launch into his own personal skit...to great effect!
You might recall seeing the scene on the show. It was not revealed until later that the entire scene was ad-libbed by Conway.