Show one hammer contact advancing the same nail

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

1. Task and boundary

Advance one already started nail with one hammer strike. The nail is supported before the clip begins, so the shot can concentrate on hammer-to-head contact and the resulting change in insertion depth. Keep some shaft visible at the end; complete disappearance would remove the reference needed to distinguish deeper insertion from a shrinking nail.

This is an untested visual continuity brief. Use an accurately drawn demonstration or an authorized staged reference with one isolated nail and no hand holding its head. Request a modest advance, not a flush finish, multiple strikes or a dramatic shattering block. The clip is not a safe-work procedure or evidence of impact force.

2. Authorized first frame

Prepare a photograph or accurate drawing you own or may use. Show a wooden block resting in a fixed cradle, one straight nail already partly inserted vertically, and the original hammer held above its head. View slightly from the side so the nail head, exposed shaft and block surface remain separately readable.

Place a dark grain mark on the block beside the entry point as a stationary depth reference. The nail should have enough exposed shaft for a small reduction to remain visible. Keep the original hammer face aligned over the head and leave room for a short downward arc and its rebound.

3. Use the generator

Open the current image-to-video generator in a mode accepting your authorized first frame. Paste the complete prompt, check the available settings and cost estimate, then submit only when ready. This page supplies text; it does not upload an image or start a generation.

4. Prompt and timing

Start from my authorized image of one fixed wooden block, one straight nail already partly inserted, and the original hammer above its head. Lock the camera, cradle, block grain and nail entry point. Bring the hammer down once on a short controlled arc. The original hammer face visibly meets the original nail head before the nail moves deeper. After that single contact, advance the same rigid nail downward along its existing axis by a small distance. Keep the nail head attached to its shaft, preserve its diameter and leave some shaft exposed above the unchanged wood surface. Let the hammer lift clear after the strike and stop without another contact. The nail remains at its deeper position. No early sinking, bent nail, shrinking metal, duplicated head, splinter burst, new tool, extra hand, cut, camera move or impact measurement.

Opening: identify the block surface, fixed entry point and original exposed shaft length.
Middle: inspect the hammer-to-head contact and verify that deeper nail movement follows it.
Ending: after the hammer lifts clear, compare the remaining exposed shaft against the same block grain.

These beats are author suggestions, not exact model timing guarantees. Adapt their proportions to the clip length actually available.

5. Inspect the output

After inspecting your own output, record a time or frame, visible observation and pass, fail or inconclusive judgment for each condition. A convincing ending alone does not verify the preceding action.

The block, cradle and entry point stay fixed.
One hammer face contacts one nail head once.
The nail does not advance before that visible contact.
The head and shaft move together along the original nail axis.
Less shaft remains above the same surface, with the head still identifiable.
The hammer separates and the nail retains its deeper position.
If motion blur hides contact ordering, mark that causal check inconclusive.

6. Fix one failure

The nail sinks before impact: establish a still opening and put head contact before displacement.
The nail gets shorter in midair: preserve the head-to-shaft connection and compare against the fixed surface.
The block drops with the nail: strengthen the cradle reference and keep its grain stationary.
Several strikes occur: request one contact, a small rebound and a final stop.
The hammer obscures the ending: leave a clear gap after rebound before the hold.

7. Ending and limits

Finish with the hammer held clear and the same straight nail seated slightly deeper, still protruding from the unchanged block.

Save your own generated result through the available result controls, together with the authorized input, exact prompt, settings and inspection notes.

No generated result, penetration experiment or structural test is supplied. The image sequence can show contact and relative depth, but cannot determine wood hardness, fastening capacity, impact energy or hidden nail damage.

A bouncing-ball scene follows separation after elastic impacts. The connector task follows guided insertion. This task links one impact to retained advance of a rigid fastener into a fixed substrate.