The YouTube account for Johnny Carson has just made available a clip of The Tonight Show Starring Johnny Carson from 1974, in which the guests were Jack Benny and Mel Blanc. Blanc, "the man of a thousand voices," tells how he got his first job in voice work in 1927. That puts this recording halfway between Blanc's breakthrough and today. Listen to Blanc do his cartoon characters, plus a car, a horse, and more. He and Benny go over some of their old routines and laugh at themselves so much that we can't help but laugh along with them, even when they can't remember the punch lines. -via Digg