Our body is supposed to be paralyzed during REM sleep, but REM sleep behavior disorder might not allow you to stay in bed. It could even cause you to act out your dreams in real life.

This small animal might seem like a run-of-the-mill rodent at first, but its huge back legs can produce kicks hard enough to let it rumble with rattlesnakes looking for a meal.

If most people got on a skateboard, they would roll forward slowly for a few feet, then fall down and break their wrists. But there are a proud few who can do some pretty amazing tricks on a board, and they use physics to pull them off....

In this video Paul Andersen explains how light travels in photons which can be described as both particles and waves. Einstein showed that photons can be described as particles using the photoelectric effect to show that the energy of a...

Howcast - Learn how to do the bboy dance move known as the windmill in this Howcast breakdancing tutorial with choreographer Victor "Kid Glyde" Alicea.

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Howcast - Learn how to do a front kick karate move from karate instructor Richard Amos in this Howcast video.

Howcast - Learn how to do passing the open guard techniques from Team Radical MMA head coach Rene Dreifuss in this Howcast MMA video, part two of two.

Howcast - Learn how to do the guard self-defense move from Alliance MMA black belt Babs Olusanmokun in this Howcast Brazilian Jiu Jitsu video.

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Howcast - Learn five qualities college football recruiters look for in a high school kicker / punter in this Howcast video with coach Randy Taylor.

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Howcast - Learn how to escape a wrist hold in this self-defense video from Howcast.

Howcast - Learn how to do three swimming drills that will improve your backstroke in this swimming lesson from Howcast.

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Howcast - Learn how to do a powerslide to bigspin from competitive skateboarder Nate Cohen in this Howcast skateboarding video.

Howcast -If you want low impact, this is it. Build your strength with water exercise and protect yourself from injury while having some fun.

Howcast -Learn how to dance like Justin Bieber from choreographer Matt Steffanina in this Howcast dance video.

Howcast -Learn how to make the 1-rail kick shot from pool trick shot champion Andy Segal in this Howcast video.

Howcast -Learn the basic line dancing steps known as ball change actions in this Howcast dance video with expert Robert Royston.

Kicking around a hackysack develops agility and coordination and is a fun game to practice alone or play with friends.

Follow along with me and Elijah as we go through some more warm up exercises for your PE lessons!