DIY rocket launcher with a cork, soda bottle, vinegar, water and baking soda.

Beakman challenge: Pick up a jar without touching it. Light a napkin and put it inside of a glass jar. Quickly place an infalted balloon on top of it. The balloon will partially be sucked into the jar due to the change in air pressure so you can pick up the jar by the balloon and not be touching it.

Beakman challenge: drink punch out of a glass with two straws: one inside the glass and the other outside. The straw outside of the glass causes the air pressure inside the mouth to match the outside of the mouth. Now you don't have the ability to get the liquid to move into the mouth due to the air pressure change since it's the same.

Beakman explains flatulence and why our bodies build up gas that needs to be expelled. He explains how various foods affect the bacteria in the colon and that they release gas and cause it to accumulate. They also mention that the sound of flatulence comes from the anal sphincter.

Brothers Mortimer and Randolph Duke explain to William that they're commodities brokers. They explain what commodities are and provide examples of them. They then mention how they earn money: through the commissions of their clients.