Howcast - Learn what plyometrics is in this Howcast video about the muscle building exercise regimen.

Howcast - Learn how to do the invisible thread on a napkin trick in this dinner table magic tricks video from Howcast.

Howcast - Learn how to do the top three plyometric exercises that improve vertical jump in this Howcast workout video about plyometric exercises.

Howcast - Learn how to do a butt kick in this Howcast workout video about plyometric exercises.

Howcast - Kata is a combination of karate poses and movements. It's designed to be practiced alone against imaginary opponents, to strengthen your mind along with your body.

Howcast - Learn how to do the pace in this street dance video from Howcast about locking.

Howcast - Learn how to do the which-a-way in this street dance video from Howcast about locking.

Howcast - Learn how to do the hip-hop dance move called the scarecrow in this street dance video from Howcast.

Howcast - Learn how to do turfing wave illusions in this street dance video from Howcast.

Howcast - Learn how to do sexy lower body isolations in reggaeton with this Howcast Latin dance video.

Howcast - Learn how to do an advanced zouk dip with this Latin dance video from Howcast.

Howcast - Learn how to do the zouk washing machines dance step with this Latin dance video from Howcast.

Howcast - Learn how to dip in zouk dance with this Latin dance video from Howcast.

Howcast - Learn how to do the zouk slow wave and sway in this Latin dance video from Howcast.

Howcast - Learn how to do the swimming technique called sculling in this online swimming lesson from Howcast.

Howcast - Learn how to turn on the runway from model scout Trudi Tapscott in this Howcast video about how to model walk.

Howcast - Learn how to stretch before sprinting from sprinting coach Shane Paul Neil in this Howcast video.

Howcast - Learn how to do a jump over hurdle from Warrior Fitness Boot Camp creators Ruben Belliard and Alex Fell in this Howcast workout video.

Howcast - Learn how to do a dumbbell thruster from Warrior Fitness Boot Camp creators Ruben Belliard and Alex Fell in this Howcast workout video.

Howcast - Learn how to foam roll your TFL in this Howcast video featuring certified NYC trainer Amanda Edell.

Howcast - Learn how to animate a clay face from Joe Vena of the Children's Museum of the Arts in this stop motion tutorial from Howcast.

Howcast - Find out if rabbits get along with other pets in this Howcast video featuring bunny lover Amy Sedaris and rabbit expert Mary E. Cotter.

Howcast - Parkinson's disease is a chronic condition caused by a lack of dopamine in the brain. Diagnosis can sometimes take years; knowing symptoms can speed up the process.

Howcast -Learn how to do a pole spin from pole dancing instructor Mai Yee in this Howcast video.