Have you ever woken up in the middle of the night with a charley horse in your leg? What's actually going on inside your body? Get 20% off new domains, web hosting and email from https://www.domain.com by using the code "NOGGIN". Life Noggin is a weekly animated educational series. Whether it's science, pop culture, history or art, we explore it all and have a ton of fun doing it. Follow Us! https://www.LifeNoggin.com http://lifenogg.in/follownoggin https://facebook.com/LifeNoggin Life Noggin Team: Animation & Designed by: http://www.krofl.com Voiced by: http://youtube.com/patdoesit Written by: https://www.youtube.com/coconutcab Produced by: http://www.twitter.com/IanDokie Sources: http://www.medicinenet.com/muscle_spasms/page5.htm http://www.pbs.org/wgbh/nova/body/our-ability-to-walk.html http://health.howstuffworks.com/human-body/systems/musculoskeletal/muscle3.htm