What Tiodlliwi is saying is very real. RLS is uncontrolable. You will be sitting there and out of the blue, your leg will fly up. There is nothing you can do to control it.
I have this condition also.
I also have a condition where my whole body will jerk. Sometimes, quite violently. It can be very painful. I talked to my doc about this and he said that it is caused by the spinal cord being squeezed and the muscles reacting. I have severe spinal issues so that is what is causing my problems.
If you don't have any control over this problem, you may want to talk to your doc about this. It could very well be RLS.

Hugs,
Linda