A segment of Mystery Science Theater 3000 wherein the Joel & the Bots exchange invention prototypes with Dr. Forrester and TV's Frank.

The inventions are always incredibly silly; Joel's are usually whimsical and lighthearted while the Mads's inventions tend to be a bit more malevolant, although ultimately harmless.

When the inventions are good (Like the "Cartooner" - "Ziggy had Garfield neutered?!") the can be among the funniest parts of the show. Good fun all around.

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