It's Important, Really
As pointed out by
You can also comment here if you wish on your favorite Mel moments. I have to say that it is either Jack Benny's car, or Sy ... as much as I love either of the above in the poll.
edit Oh, and they did a special animation for a Warner Brothers gag reel, which they would show at the annual Christmas party. If you haven't seen it, go do a search on Porky Pig gag or some such thing on You Tube. I can't get to You Tube right now, so if someone finds it, please put the link in comments.