Like I can predict which body part would suddenly move and what direction it’ll move in and move there to minimize how forceful the movement is. I’ve been searching all over for years and I have no idea what causes it. It happens more when I’m cold lol. It doesn’t affect my quality of life or anything it’s just some weird unexplained thing.
Closest thing I can say to that is when I’m in a sort of half sleep state I’ll have a reaction if I happen to dream/think of stepping off something and try and catch myself in real life. Essentially the brain playing tricks on my body.
Hypnic jerk - but OP sounds like something else. I experience small (OP’s sound forceful) twitches for a few days after lifting weights, but I think that’s just my magnesium deficiency