Sam makes a daredevil move and skateboards down the California Incline. As much as he enjoys the ride, he has trouble stopping his skateboard when he gets near the end of the Incline.
The crew on the ship prepare to perform a "flip and burn" manuever. This manuever puts an intense toll on the crew, as they need to strap in and inject themselves with some fluids during it. This clip illustrates that the effects of gravity and acceleration should be indistinguishable.
Beakman sings a song about Isaac Newton and inertia and pretends to be Newton to explain his Laws of Motion. To demonstrate the Laws of Motion, Beakman does an experiment where he has eggs on cardboard tubes resting on a piece of cardboard over cups. He asks what would happen if the broom moves the cardboard. He hits the cardboard only, the tubes and cardboard are moved, and gravity pulls the eggs down into the cups.
Homer slicks the floor with oil in an attempt to injure himself at work. Due to the significantly reduced friction, he stays in motion at the same speed and direction, thus failing to harm himself.
Sheldon explains how he uses a toy train and a ball to prove Newton's first law of motion. As the train moves, he pushes a button to propel the ball in the air. The ball lands in the same spot on the train where it was propelled. The ball moves at a constant velocity in an inertial frame of reference.