A sudden jolt through my entire body
Sometimes I will be sitting up or laying down and I get a sudden jolt through my entire body. A few times my body has done it quite a few times in a row. My entire body jumps and I can't tell when it's going to happen or even try to prevent it. I noticed that when I'm upset it happens a lot too. Is this normal? What could cause this? I'm a little overweight but generally healthy.