Yeah usually the twitch is accopanied by a feeling of a fall in your subconscious mind. (Maybe its your bodies reaction to thinking that you hit the pavement ) You know coming to an abrupt stop Anyways yeah it is scary and can be a pain but it is not dangerous unless it starts to become a regular event. If it does that you might want to check with your doc....I mentioned to them once that I had a problem with twitching at night when I was fallen/half asleep and they ran a crapload of tests.

But yeah, don't worry about it....unless it gets worse....oh and BTW it seems to be more noticeable for me anyways when I am stressed. So maybe y'all just need to chill out lol