Use this original close-up of a loose fist, thumb across the lower front, coral cuff and teal forearm. Keep the camera, wrist angle and forearm steady. The index finger at the picture-left side next to the thumb slowly uncurls from its existing knuckle and extends upward. Keep the other three fingers folded and the thumb across the lower front, leaving the index root readable. Pause with exactly that one finger extended. Then fold the same index finger back into the original loose fist once and stop. Show continuous bending rather than growing or deleting a finger. No full-palm opening, extra digit, second hand, object, touching, pointing target, speech, camera move or cut. The simplified drawing is a planning input, not proof of accurate anatomy.