Revealing mistake: In the scene where Ronnie visits Brundlefly for the second time we see Brundlefly walking on the ceiling and wall, however his shirt doesn't remain consistent with gravity. This is especially obvious when he pulls his shirt up to show Ronnie his new tumor and then places it back down. The shirt appears to be being pulled up to towards the sky from Ronnie's perspective. (01:07:30)
The Fly (1986)
1 revealing mistake
Directed by: David Cronenberg
Starring: Jeff Goldblum, Geena Davis, John Getz, Joy Boushel
Plot hole: In any given volume of air, there are any number of tiny, living organisms; dust mites, viruses, bacteria, etc. Why did the teleporter combine Seth's DNA only with the fly that was in the chamber? If he had taken the "floating organisms" into account in his calculations and programming, then why would he not have excluded ALL foreign DNA?
Tawny: Are you a body builder, or something?
Seth Brundle: Yeah, I build bodies. I take them apart, and put them back together again.
Trivia: The film's director, David Cronenberg, has a cameo in this film as the doctor who helps Ronnie deliver her maggot baby.
More questions & answers from The Fly
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Chosen answer: I think it was a chip from an old-styled electrical device, like a computer.
kh1616