See Jimmy Run After a humiliating defeat by Cindy in the school relay race, Jimmy improves his shoes so he can run at the speed of light! Unfortunately, he gets stuck in this super-fast mode. Unless he finds a way to slow down, he will disappear – for good. Invention: NeutroGunk (super-fast shoes)
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Ready to Watch The Adventures of Jimmy Neutron Boy Genius, Season 1, Episode 12?