One finger snap: preload, release and reach the palm

Original, untested video brief. No input image or generated result is supplied.

1. Task and boundary

A thumb and middle fingertip begin pressed together, then the middle finger slips off and travels toward the palm. The thumb separates while the other fingers remain in their original relaxed group. The meaningful event is contact changing into a rapid release and palm arrival, not merely a fist changing shape.

This original visual brief is untested. Use one enlarged adult hand with readable finger roots. Exclude an audio requirement, rhythmic repetition, a clap and a full-hand flourish. The contact pause is a staging cue and does not establish the amount of stored force.

2. Authorized first frame

Use a photograph or accurate drawing you own or are authorized to use. Present the palm obliquely with the middle fingertip already touching the thumb pad. The index finger sits slightly raised, while ring and little fingers are loosely curled.

Include all five digit roots, the palm heel and wrist. Leave the middle finger’s route into the palm unobstructed by the thumb silhouette. Avoid jewelry or motion blur that confuses the contact. Identify the middle finger by its root between index and ring fingers rather than by which fingertip happens to look longest.

3. Use the generator

Open the current image-to-video generator in a mode accepting your authorized first frame. Paste the prompt; check settings and cost before submission. Nothing runs automatically.

4. Prompt and timing

Begin from my authorized close-up of one adult hand with the middle fingertip pressed against the thumb pad. Keep the camera, wrist orientation and finger identities steady. Hold that existing thumb-to-middle contact briefly. Then let the middle fingertip slide off the thumb and the same middle finger flex quickly toward the palm, ending against the fleshy palm area below. Let the thumb separate enough to reveal the release path. Keep the index, ring and little fingers close to their original relaxed poses. Preserve each digit’s root and joints throughout the faster movement; do not replace the hand with a finished snapping pose. End after one release with the middle finger curled toward the palm. No sound requirement, repeated snap, extra digit, whole-hand rotation, magical effect, cut or gesture sequence.

1. Opening quarter: locate the touching pads and trace the middle finger back to its root.
2. Middle half: inspect separation at the thumb, flexion of the same finger and arrival near the palm.
3. Final quarter: hold the released pose briefly with the wrist and other three fingers still recognizable.

5. Inspect the output

For each check, record a frame or time, observation and pass, fail or inconclusive judgment.

• Thumb and middle finger visibly touch before their separation.
• The middle fingertip leaves that contact and travels toward the palm.
• The moving finger retains its original root and continuous joint chain.
• The thumb clears the route without turning into another fingertip.
• The other three digits remain identifiable and only one release occurs.
• If blur or frame spacing hides the release or palm arrival, mark that phase inconclusive; an apparent snap or soundtrack cannot supply missing visual evidence.

6. Fix one failure

• The index snaps instead: name the middle root between the index and ring fingers.
• The hand changes in one jump: request visible pad separation before the completed curled pose.
• Every finger opens: restrict motion to the thumb and middle finger pair.
• The palm arrival is obscured: change the authorized viewing angle and keep the thumb farther from that route.

7. Ending and limits

End with one released middle finger curled toward the same palm and the thumb separated, without resetting for another snap.

Save your result, authorized input, exact prompt, settings and inspection notes.

No H3 output, acoustic result, force estimate or anatomical validation is supplied. The prompt describes visible motion only.

The index extension task uncurls and returns one digit without a loaded contact. This task requires a thumb–middle contact, its release and a different terminal contact at the palm.