Corrected entry: Jumping as high as you want, and making someone bounce on a wall, or solid floor is not possible. Energy cannot be created, or destroyed. A basketball doesn't bounce because pressurized air inside creates kinetic energy, it bounces because the pressurized air inside converts more potential energy into kinetic energy. While energy can be converted, it cannot be created or destroyed.
Corrected entry: At the end of the movie, the professor and his wife are flying in the car next to the plane. Don't passenger planes go at least 600 miles an hour? The force of the wind at that speed would break the car apart, and kill the passengers.
Corrected entry: At the end of the movie, Professor Brainard and Sarah were flying next to an airplane. How could they be up there? Isn't it very cold up in the sky?
Corrected entry: Professor Brainard put flubber on a bowling ball. It hit a guy in the head. The bowling ball should have cracked the guy's skull when it hit him.
Corrected entry: When Professor Brainard sprays the flubber on his shoe in the basketball court, he puts his foot down and it won't stop bouncing until he falls down. When the basketball players have flubber on their shoes, they have to jump to make it work but Professor Brainard didn't jump.
Corrected entry: The professor is amazed when he manages to utilise flubber to make an anti-gravity device. Fair enough, I'd be amazed. The bit that I don't understand is that his best companion Weebo (or whatever its stupid name is) is a flying robot, that seems to defy gravity itself. It has no propellers or turbines of any kind, but yet still effortlessly flies around, so I can only assume that it runs on a similar device to the flubber!
Corrected entry: If you drop something, no matter what it weighs, it will always fall at the same speed, yet, during the course of the film the bowling ball catches up with the golf ball. You can tell this because, even though Brainard set off the two balls separately, they are soon bopping the two villains at the same time.