Watch the disc change shape

A hillside phone clip from Costa Rica: follow the outline, camera movement and missing scale.

What to keep in mind

This is a published copy attributed to the witness. Its original file is not authenticated here; an in-scene object could still be a small model.

Hold the foreground

Choose a rock or branch as your reference. When the disc shifts or tilts, what moves in the foreground at the same time? Separate camera movement from changes of the outline.

Find the missing scale

Can this clip distinguish a nearby small object from a larger distant one? List what you would need to measure before using the witness’s distance estimate to calculate size.

Test a model explanation

Compare the tilt with the suspended-model proposal. Which visible change would a model need to reproduce? Keep a plausible explanation separate from evidence that a particular model was used.