How It's Made
Season 4 Episode 20 - CO2 Cartridges and Pretzels
Discover how CO2 cartridges, pretzels and skating rinks are made.
Audio Languages: English
Subtitles: English
Season 4
S04:E01 - Footballs and Marbles
Explore the secrets behind footballs, marbles and airplane propellers.
S04:E02 - Engine Blocks and Drums
Discover how engine blocks, jawbreakers and drum shells are constructed.
S04:E03 - Lighters and Hockey Pucks
Explore the secrets behind lighters, fossils and hockey pucks.
S04:E04 - Balloons and Wallpaper
Discover how balloons, wallpaper and incandescent light bulbs are made.
S04:E05 - Matches and Fine Porcelain
Explore the secrets behind matches and automobile fuel tanks.
S04:E06 - Glass Cookware and Soap Bars
Discover how soap bars, steel drums and firefighter uniforms are made.
S04:E07 - Crayons and Gold Chains
Explore the secrets behind crayons, wooden kayaks and lawn mowers.
S04:E08 - Inflatable Safety Devices
Discover how safety devices and braille typewriters are made.
S04:E09 - Fortune Cookies
Explore the secrets behind fortune cookies and IMAX projectors.
S04:E10 - Hand Saws
Discover how firefighter helmets and packaging tubes are made.
S04:E11 - Halogen Bulbs
Explore the secrets behind halogen bulbs and cellulose insulation.
S04:E12 - Drill Bits and Stamps
Discover how drill bits, stamps and photo booths are made.
S04:E13 - Yacht Wheels and Chisels
Explore the secrets behind yacht wheels, braided rugs and chisels.
S04:E14 - Fur Tanning and Photographs
Discover how fur tanning, photographs and electric violins are made.
S04:E15 - Glass Bottles and Goalie Masks
Explore the secrets behind glass bottles, hacksaws and goalie masks.
S04:E16 - Paintbrushes and Flashlights
Discover how lacrosse sticks, flashlights and paintbrushes are made.
S04:E17 - Optical Lenses
Explore the secrets behind battery tins and optical lenses.
S04:E18 - Horseshoes and Frozen Pizzas
Discover how horseshoes, dishwashers and frozen pizzas are made.
S04:E19 - Pistons and Chimneys
Explore the secrets behind pistons, paint rollers, parachutes and chimneys.
S04:E20 - CO2 Cartridges and Pretzels
Discover how CO2 cartridges, pretzels and skating rinks are made.
S04:E21 - Hockey Sticks and Treadmills
Explore the secrets behind hockey sticks and hand-held computers.
S04:E22 - Motorcycles and Whistles
Discover how motorcycles, clay pipes, drum sticks and whistles are made.
S04:E23 - Handcuffs, Caulking Compound
Explore the secrets behind handcuffs, and see how propane tanks are made.
S04:E24 - Fur Coat and a Golf Tee
Discover how a fur coat, a hearse and a golf tee are made.
S04:E25 - Fishing Reels, Kitchen Mixers
Explore the secrets behind fishing reels and kitchen mixers.
S04:E26 - Manhole Covers and Snowmobiles
Discover how manhole covers, range hoods and snowmobiles are made.
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