I have such profound weakness in my left leg. Especially noticeable when I walk. But at night.....when I'm trying to relax.....my left leg seems to get a life of it's own! I have to keep moving it and flexing/relaxing the muscle. If I try not to it moves on it's own and gets the strangest feeling - not painful but definitely uncomfortable. I get L'Hermitts symptoms in my left leg, too. If I turn my head down towards my chest and turn it to the right my left leg feels like it's almost coming off the floor and I lose all coordination in it. Very, very strange sensations.