Howcast - Learn how to play the six-stroke roll from drum teacher Jason Gianni in this Howcast drum video.

Howcast - Find out if chiropractic adjustments relieve headaches from Dr. Karen Erickson in this Howcast video.

Howcast - Learn how a chiropractor treats neck or cervical pain from Dr. Karen Erickson in this Howcast video.

Howcast - Learn what a spinal adjustment feels like from Dr. Karen Erickson in this Howcast video.

Howcast - Learn what that popping sound means when a joint is adjusted by the chiropractor from Dr. Karen Erickson in this Howcast video.

Howcast - Learn what a chiropractor is from Dr. Karen Erickson in this Howcast video.

Howcast - Learn six tips about gesture drawing from professional artist Kevin Kobasic in this illustration and drawing tips video from Howcast.

Howcast - Learn how to show movement in a drawing from professional artist Kevin Kobasic in this illustration and drawing tips video from Howcast.

Howcast - Learn how to do an incline front raise from certified personal trainer Max Tapper in this home chest workout for men video from Howcast.

Howcast - Learn how to get an infant to sleep from parenting coach Tammy Gold in this Howcast baby care video.

Howcast - Learn about taking vertical vs. horizontal pictures from commercial photographer Dan Bracaglia in this digital photography lesson from Howcast.

Howcast - Learn how to do a barbell forearm extension from personal trainer Brett Azar in this Howcast home arm workout for men video.

Howcast - Learn how to do a dumbbell bench press from personal trainer Brett Azar in this Howcast home arm workout for men video.

Howcast - Learn how to do house party dance moves for a cardio workout from fitness instructor Michelle Seabreeze in this Howcast dance workout video.

Howcast - Learn how to do a push kick in kickboxing from Mushin MMA's Sean Hinds in this muay Thai training video from Howcast.

Howcast - Learn how to practice a knee attack using a wall from Mushin MMA's Sean Hinds in this muay Thai kickboxing training video from Howcast.

Howcast - Learn how to do squats from certified personal trainer Max Tapper in this Howcast gym workout video.

Howcast - Learn how to do the Butterfly from professional dancer Charlene "Chi-Chi" Smith in this Howcast dance video.

Howcast - Learn how to do a long serve from New York City Badminton's Chris Awong in this Howcast video.

Howcast - Learn how to throw the Bo Shuriken with proper technique from Sensei Oliver Martin in this Howcast ninjutsu video.

Howcast - Learn the basic sword cut from Sensei Oliver Martin in this Howcast ninjutsu video.

Howcast - Learn what causes stomach cramps from gastroenterologist Lisa Ganjhu, M.D. in this Howcast video about stomach problems and digestive disorders.

Howcast - If you want to shake your booty like Beyonce, you'll have to work on your flexibility – and a style of dance called J-Setting.

Howcast - Learn how to do the Egyptian wine in reggae dancehall from the founders of Str8FramYaad Dancehall Aerobics in this Howcast dance video.