This morning around like 4am I woke up and was trying to fall back asleep. Well im on my back and my feet are right just past the end of the bed. As I move my left foot down, the muscle behind my leg will contract right. I was tryin to turn to my side then that leg muscle began to contract uncontrollably and wouldnt relax. It was hurting and felt unusual at the same time and lasted for like 10 seconds. Ouch.