Here's Mel Blanc on The Tonight Show Starring Johnny Carson for May 26, 1983. Mel did a lot of interviews over the years in which he told not-quite-accurate stories about how the voices of Bugs Bunny, Porky Pig and others in that mob came to be. They weren't exactly lies. They were just stories that had been reconfigured to be shorter and funnier because that's what interviewers usually wanted. And for a long time, there were no scholars of animation history to stand up and say, "No, that's not how that happened" or "No, Mel was not the first voice of Porky Pig."
But eventually, there were such scholars and Mel began to "true up" his anecdotes and what he says in this appearance is basically true…though obviously the part where Johnny asks him to do a Nazi Pig was planned and not improvised on the spot. And one of the best parts of this video is seeing Mel walk out under his own power. As you all know, he was in a near-death auto accident in 1961 — the kind where it was amazing he survived, let alone was able to walk again.
I met him on several occasions and even — and I can hardly believe this — directed him for a TV special in 1984, about thirteen months after this appearance with Johnny. He walked with a cane then at a very cautious, slow speed but he was a great enough showman to not appear on Carson's show that way. Johnny, of course, had zillions of people in his guest chair over the years. I suspect there will come a day on this planet where the only one of them whose work will still be enjoyed by whatever life form inhabits Earth will be Mel Blanc…