This simple move the Middle Finger Hook was passed down from an old Chinese doctor., If your finger feels sore or stiff when you bend it, its likely a sign your energy flow (or circulation) Hand Arm Vibration Syndrome Causes and Prevention NASP Does anyone else get a single finger moving trembling uncontrollably? a) Vibration induced white finger. (b) Vibration induced white finger. Download Scientific Diagram My middle finger twitch a lot when I position the finger this way. Doesn't happen with other fingers Amazon.com: DR DINGUS Finger Hands (10 Middle Fingers) Premium Rubber Little Tiny Puppets Fun and Realistic Design Ideal for Jokes, Gag Present, Fun for All Kids! : Toys & Games