What a find!
Here's a wonderful rarity: Jonathan Winters riffing between takes of a Big Boy Restaurant commercial. And even better: he's dressed line Big Boy.
This is all off the cuff, unrehearsed improvisational video that someone on the crew of this 1970s era commercial, thankfully, saved.. In other words, Winters gold!
Big hat tip to Scott Shaw!
Related:a 1970s Disney Halloween TV special featuring Mr. Winters