Todd Sampson takes an incredible flight powered by 130 massive helium balloons; in this dangerous experiment, Todd must use science to defy gravity and make it safely back to earth.

Todd Sampson tries to defy the deadly power of fire and dives into a blazing-hot inferno; with nothing but a thin layer of water to protect him, science could mean the difference between life and death.

Todd Sampson releases a wrecking ball inches from his face in a dangerous experiment that tests the science of energy; as it hurtles back at him at 15 miles an hour, Todd must trust science to stop the wrecking ball before it crushes him.

Todd Sampson takes a deadly leap of faith; in a dangerous bungee jump, his life depends on the strength of two phone books weaved together.

Todd Sampson tries to defy gravity by scaling a 13-story building with nothing more than two vacuum cleaners strapped to his back; the invisible force of air pressure could mean the difference between life and death.

Risking it all in the name of physics; Todd Sampson goes up against one of the world's deadliest weapons; facing an AK-47 rifle underwater.