Did you catch this in Meet The Robinsons? Lewis can be shown returning to his lab toward the end of the film to continue working on the inventions that would eventually make him one of the most successful men in history. A pair of anti-gravity boots is one of the inventions that may be seen in the backdrop. In a scene that was cut, Lewis was supposed to utilize these boots to fight the robot Dolores, even though they represent just a small part of the overall action. In the film, we were never given a chance to observe the boots in use.
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