Kevin & Grant try to survive a 30mph ride through rough terrain in their Off-Road Soap Box Racers. The classic homemade Volcano gets supersized into a 3-stage eruption. Aerodynamics and a 46-year old gridiron record are challenged by a Football Cannon.

Kevin and Grant tackle three audacious summer-themed projects. Can they make a 400-pound canoe float? Can you stop a speeding car without its brakes? Will the guys discover a beer trick that will make your summer cookout the party of the season.