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.