While there, a mysterious mist arrives in the town, and it's not long before the people of the supermarket realize that the mist is hiding mystery creatures as a siren rings out in the distance ...

there’s nothing sinister about the figures, who are particularly easy to see when it’s foggy. That’s because they appear when a person creates a shadow that’s cast onto a cloud or mist ...

A woman has described the "breath-taking" experience of seeing a rare ghostly shadow phenomenon while out walking. A Brocken spectre optical illusion happens when a person's own shadow is projected ...