Ken not only freezes from time to time in a standing position, he can freeze with one arm in the air and seem to hold it there for several minutes until someone moves it for him. In the same vein, we attended a talk recently where the speaker said to get someone moving again put a piece of paper on the ground in front of them and they will step over it. Ken shuffles with tiny little steps, so I put sheets of paper in front of him as he walked and he took great big steps over them all across the room! Of course, he went back to shuffling as soon as I stopped putting the papers there.