Sophie and Trace watch a video of skateboarders working up enough speed to complete a full loop, then look at what makes it possible for a skateboarder to successfully get all the way around a vertical loop.
Looking at the blob, a giant airbag on the water that launches a person in the air; the teeterboard, where acrobats land on opposite ends of a seesaw and launch the other; the Russian swing, where acrobats rock back and forth and fling someone.
Trace and Sophie watch some mesmerizing clips of sound being used to manipulate all kinds of matter; in one experiment they break down how sound waves can keep water drops suspended in the air.
Sophie and Trace create a simple experiment demonstrating the principles of jet propulsion, then try to make a miniature hydrojet support greater weight.