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What Could Possibly Go Wrong?
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Grant is sure of his advantage in a paintball bet if he's wearing night vision goggles he built out of materials rustled up in the garage.
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01:58
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Night Vision Goggles
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Homer Simpson would love Kevin's bowling ball that is engineered to be steered into the pins each time. Or is it?
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01:22
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The Remote Control Bowling Ball
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The guys hit the range with a lot of duct tape, and a lot of scenarios to craft something to stop a 9mm Luger round.
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02:15
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The One With Duct Tape and Guns
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In the first pool test of Kevin & Grant's homemade submarine, things start to go belly up when Grant smells smoke.
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02:55
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The Scary Submarine
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Kevin and Grant turn their first test - choosing a tire for the monocycle - into a project of its own. Giant tire bowling with trash can "pins."
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03:13
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Tire Bowling Test
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The guys build their life size punching robots, complete with pneumatic power. Round one proves to be brutal.
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01:46
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Rock 'Em Sock 'Em Robots
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The mission is to escape from the island using nothing more than what they would have had in the ‘50s. Grant is in a makeshift raft, Kevin is going to swim.
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03:34
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Escape From Alcatraz
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The guys have built dream motorcycle chariots, and as always they had different approaches for their builds. Let’s see what happens at the first test.
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02:45
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Motorcycle Chariots of Glory
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The guys each invest in some heavy junkers and modify them to stand up to their personal Mad Max demolition derby. Lots of spikes are used.
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02:01
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Armored Car Attack Strategy
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Kevin and Grant wire together a crazy homemade lie detector with spare parts in the garage. They’ve kicked it up a notch by adding a shock if they are caught in a lie.
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01:45
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Homemade Lie Detector
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Kevin shows how quicksand is created by agitating a sand and water mixture. With Grant standing in it as a test.
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01:53
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Creating Agitation
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The guys test several "squirt gun" formats, with one powerful enough to knock down a brick wall. Once that's done, they're off to build a better version.
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02:20
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Uber Squirt Gun
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People jump off tall things. Grant and Kevin want to do it right, so part of the prep is to create a cushion. Their first test is with carboard boxes
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01:25
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What Could Possibly Go Wrong?
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Box Fall Test
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Kevin and Grant watched the internet community jumping off things using small parachutes, umbrellas, and tarps to break their fall. Naturally, they tried it too.
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02:30
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What Could Possibly Go Wrong?
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Three Things That Don’t Help Decelerate
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Kevin and Grant build two different types of earthquake resistant test tables and their own seismograph. Initial tests in the back of Grant’s truck provided inspiration.
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03:17
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The Earthquake Resistant Table Test
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Fascinated the the aerodynamics and speed of hydrofoils, the guys decide to build one. They understand the science, but they’ve never done it before. Prototype testing reveals what to do next.
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02:26
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How to Handle a Hydrofoil
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Kevin and Grant want to do lawnmower jousting right, from armor to weaponry. The first step is comprehensive tests for the best jousting pole.
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Preparing For the Joust
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The guys decide they can one up some epic cannon fails with their own homemade Gatling gun, customized to shoot meatballs. Check out the build of both meat and firepower.
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Meatball Gatling Gun
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After Grant and Kevin watch some three-wheeled destruction on the internet, they brainstorm how they could do it better - with motorized trikes.
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Inspiration Phase: Motorized Trikes
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Kevin and Grant weld an air cannon in Kevin’s garage to break Don Meredith’s football passing record of 83 yards. They bring the cannon to the field for a "slug" test. Is it record worthy?
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01:34
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Football Cannon
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The guys are happy with their soapbox racer built to go off-road, but as always they want to test it before it goes into the field. They use Kevin’s street, curbs, and a bit of garden to start.
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01:11
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Off Road Soapbox Racer
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After viewing typical science fair style homemade volcanoes, Kevin and Grant head into the field to build a giant version, complete with the three phases of volcanic explosion.
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01:41
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Making a Homemade Volcano
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What is a James Bond test? Trying to stop a car going 30mph with no brakes, but lots of gadgets. Parachutes, air flaps and more are deployed.
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James Bond Brake Test
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What could be better than having a beer delivered straight from the fridge to the garage? Kevin and Grant build a pneumatic tube system and start testing.
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Beer Delivery System
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The guys are serious about building a giant paper airplane that will fly 200 yards. Let the testing begin.
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01:36
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Giant Paper Airplanes
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Kevin and Grant are building a vortex cannon to see how many trash cans they can topple. Attempt #1 includes propane and air.
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01:27
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The First Vortex Cannon
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Kevin shows Grant how quantum levitation works with magnets and superconductive material. They play with the materials before creating their visionary slot car toy.
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02:51
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Slot Cars Move With Magnet Magic
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The guys don't just build a mini-golf course, they build one that guarantees a hole in one every single time.
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Hole in One
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They’ve tested the drone with paintball ammo. Now we watch as Grant and Kevin make the first person headsets and add smoke countermeasures.
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02:10
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Finishing Hand Crafted Drones
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Kevin and Grant watch some mini-golf and get the idea to build their own course and try to sink repeated holes-in-one. Of course they make the course as hard as possible.
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03:49
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These Guys Have Balls
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Grant and Kevin have tested a basic golf cart. They now systematically strip the cart for their plan to make it bigger and tougher.
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02:08
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Trashing A Golf Cart (The Right Way)
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The guys want to be superheroes. They build a wall walking machine with vacuum cleaners and now face a 50 ft. wall.
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01:30
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What Could Possibly Go Wrong?
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Wall Walking
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