Homer Simpson would love Kevin's bowling ball that is engineered to be steered into the pins each time. Or is it?

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.

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.

In the first pool test of Kevin & Grant's homemade submarine, things start to go belly up when Grant smells smoke.

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."

The guys build their life size punching robots, complete with pneumatic power. Round one proves to be brutal.

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.

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.

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.

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.

Kevin shows how quicksand is created by agitating a sand and water mixture. With Grant standing in it as a test.

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.

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

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.

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.

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.

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.

Two guys are out to right the wrongs of bad experiments and epic "this is bound to work" fails by showing what went wrong via science in action.

The guys from Discovery's "Moonshiners" have a challenge for the chunkers: destroying a still.

Air cannons take aim at the four-inch steel walls of a trailer in this challenge by the guys from "Gold Rush."

Smokin' claims it can shoot up to 20 pumpkins in a single scattershot. How will this air cannon do on an accuracy challenge?

Team NASAW tells Mythbusters' Grant Imhara what makes their new trebuchet design truly unique.

The guys from Discovery's "Fast N' Loud" challenge the chunkers to sling a car.

Watch a piano hit a high note as 58,000-pound trebuchet Yankee Siege sends the instrument flying.

Punkin Chunkin icon Fat Jimmy wants a chunker of his own. If he can pull off his complex build, it will be high times for all.

Yankee Siege sets a world record for largest pumpkin ever chunked by a trebuchet.

He came, he conquered, and now he's back for more! Does Yankee Seige's "King of Trebuchets" have what it takes to chunk it ... good? Check out this sneak peek from "Road to Chunk 2011."

Long barrels might seem more impressive, but the truth is bigger is not always better, no matter how cool it looks.

Boys love to CHUNK, but what about the ladies? Can an air cannon champion defend her title against the "big boys" of Punkin Chunkin? Check out this sneak peek from "Road to Chunk 2011."

If you're a playa, a hustler, or just want to see a gourd soar at 400 miles per hour, then THIS is the competition for you! Tune in to PUNKIN CHUNKIN, Thanksgiving night at 8PM E/P.

Witness the importance of testing and design detail in the build process of a high tech trebuchet.

Check out the first launch in this year's Punkin Chunkin competition by the centrifugal machine, United Flingdom.