Some people with Tourette's have flinging tics- sudden, seemingly motiveless urges or compulsions to throw objects..... (I see somewhat similar flinging behaviors- though not tics- in my two year old godson, now in a stage of primal antinomianism and anarchy)
But the saddest difference between them was that Zazetsky, as Luria said, 'fought to regain his lost faculties with the indomitable tenacity of the damned,' whereas Dr P. was not fighting, did not know what was lost. But who was more tragic, or who was more damned -- the man who knew it, or the man who did not?