The thing both my son & I saw on the edge of the highway looked as it disappeared as if it was moving behind seran wrap just like the photo in the link you posted shows. It started out we both said “is that a deer?” Then in started to shrink in size down to a rabbit size before it just vanished behind a ripple like a heat wave. All very quickly. We both saw it so it couldn’t be an ocular migraine. My son is uber skeptical too. So for him to admit seeing it is huge.