You’ve likely experienced a random muscle spasm at some point. Whether you’ve had an extremely uncomfortable charlie horse in your calf, had a consistent twitch in your pectoral muscle after lifting weights, or been jerked awake by a full-body twitch just as you were dozing off, you probably understand how strange it is to have a muscle moving outside of your control. So what exactly do those annoying body twitches really mean, and are they something you should be concerned about? Read on to find out!