when you get hit, usually by someone's knee in the thigh. It gives it an odd sensation and makes it rather difficult to walk on if done right, plus it hurts

This out-of-the-blue leg cramp is as intense as a kick from a palomino. "You'll be lying in bed or even asleep when you get this terrible knot-usually in the calf but sometimes in the thigh or the arch of your foot," says Steven Subotnick, D.P.M., a sports podiatrist in Hayward, California, and author of Sports and Exercise Injuries. What causes a charley horse? It can be the result of sore muscles, a mineral deficiency or hormonal imbalance or even a process known as calcification, in which blood gets trapped in a muscle and hardens. No matter the cause, here's how to get fast relief. Rub for relief. A little kneading may be all you need to pull in the reins on a charley horse. Always rub with the muscle, not across it. So for a charley horse in your calf, start behind the knee and rub toward the heel. Stretch for success. If you get an exercise-related charley horse, it's best treated with a good stretch. If you should develop a charley horse in your thigh, here is a good method to treat it. Stand on the "good" leg and grasp the ankle of the leg that has the charley horse from behind. "Then slowly pull the ankle of the injured leg up toward your buttocks and hold it for 10 to 15 seconds," advises Craig Hersh, M.D., a sports injuries specialist at the Sports Medicine Center in Fort Lee, New Jersey. "Doing that provides a nice stretch." http://www.bodyandfitness.com/Information/Health/charleyhorse.htm