Who says we're original?

Here are some black and white villian portraits that were eventually painted (in color) for the "Legion of Evil" episode. We've always found it fun (and a little bit of extra work) to break the show's usual visual style to make a special story-point, or to create a dramatic effect. Some of these are homages to artists, comics, or animation of which we are fond. These still images were inspired by a scene in the classic Bob Clampett/Daffy Duck cartoon "The Great Piggy Bank Robbery" pictured below. What tributes have you recognized?