Ever meet Howard Cosell? I have look him up on YouTube. You never see him with both hands exposed. I forget how he died but he definately had the shakes in one arm.
Howard Cosell died April 23, 1995 from a cardiac embolism (a blood clot in his heart). In later life he battled cancer and, among other things, Parkinson's Disease.
But, as far as never seeing him with both hands exposed...
Signor V.