Why do I randomly jolt while awake?

Anonymous
It kind of comes like a sneeze. Sometimes I’ll just be chilling somewhere, and then randomly jolt involuntarily. It’s like I get possessed for half a second and get forced to do the worm quickly. Sometimes I feel it coming but not always. I looked all over google but couldn’t find the answer. What is this thing called? Also, I was hit by a car while crossing the street about 3 years ago, and I don’t remember experiencing this before then.
Why do I randomly jolt while awake?
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