The Dip, Also Known As “Toon Acid”, is a greenish, ghastly chemical seen in Who Framed Roger Rabbit. It’s Judge Doom’s preferred method of Toon execution. According to Lieutenant Santino, it’s a mixture of turpentine, acetone, and benzene, which all of them are paint-thinners. Combined in the real world, they make up the solution hand animators used to use to remove ink from animation cells. This could be considered an inside joke, as your average audience member would not know what these ingredients made up. While relatively harmless to humans, any toon that comes in contact with it will melt instantly and is apparently the only surefire way to kill a toon (although Eddie Valiant gets most of The Toon Patrol members to laugh themselves to death). Ironic enough, Judge Doom ends up being dipped himself near the end of the film, after revealing himself to be actually a toon.