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.

Dewey is sick at home and creates a dominoes masterpiece. The dominoes illustrate the conversion of potential energy to kinetic energy.

Jordan conducts a science experiment in front of her class. In her experiment, she holds in front of her a ball suspended by a string and releases it. She states that, when the ball swings, it will never reach the same in front of her again.

Phil demonstrates potential and kinetic energy using an old traffic controller and a bagel. He explains the difference between the two types of energy.

Bill Nye explains potential and kinetic energy and uses a bowling ball to demonstrate the concepts.