The Magic School Bus Season 4 Episode 8 - Gains Weight Episode Title:Gains Weight.Episode Description:Phoebe has been chosen to do a slam dunk for the whole school. How can she do that? She's not tall enough. She reasons that maybe if she just knew how it felt, then maybe she could do it. Therefore, Ms. Frizzle takes the class into outer space and transforms the school bus into a planet with adjustable gravity. With little gravity, Phoebe finds a slam dunk easy, but with no gravity it is impossible to even make the ball go through the basket. However, when the lever accidentally falls into the position of heavy gravity the class has trouble even standing up. They'll have to get the gravity back to normal in order to return to Earth in time for Phoebe's performance.