Beakman explains how glider planes use gravity to fly by taking advantage of potential and kinetic energy. Using a swing, Beakman explains what potential and kinetic energy are. He also explains how the sun creates thermal heat which lifts the planes as well.
The Griswold family takes the security guard of Wally World, Lasky, hostage and makes him take them on all of the roller coaster rides. Before the ride starts, Lasky warns Rusty that he didn't have a positive experience with the ride in the past. Throughout the entire ride, Lasky appears to be nervous and sick to his stomach.