Plot hole: How did Professor Krassman get shocked into being a frog? The electronic device doesn't even touch his head.
The Muppet Movie (1979)
1 plot hole - chronological order
Directed by: James Frawley
Starring: Frank Oz, Mel Brooks, Jim Henson, Jerry Nelson, Richard Hunt
Other mistake: Whenever Fozzie is driving the Studebaker, the movements of the car don't correspond to the way he moves the steering wheel (he tends to crank it back and forth a lot).
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Answer: The closest thing to an answer is here, Martin Becker's obituary. His family states that it was a robotic Kermit on a bicycle. Outside of that, everyone else associated with the movie has been quiet on the subject.http://www.fridaythe13thfilms.com/saga/part5/martinbecker.html.
Rlvlk
They used gyros in the wheels - Martin Becker made the first self-driving bike for that movie-now the same tech is used in the self-driving bikes seen in the Netherlands. -Diana Becker, Martin's widow.