Maybe it's just because I've always thought that Mel Blanc's voices really made the cartoons - not to mention that he was from my home town of Portland - that I liked "Behind the Tunes: Blanc Expressions" more than most of the short documentaries in this series. I think that I had heard about how Mel Blanc couldn't eat carrots.
One thing that I think that they should have said was that other people who have tried to provide the characters' voices just can't do it like Mel Blanc did (no offense to them). I deliberately avoid any of these modern cartoons involving the classic characters. But the classic ones are always great, and this short did an acceptable job explaining Blanc's style.
PS: today would have been Mel Blanc's 99th birthday.