This guy was riding his bike in Greenwood, Indiana when he spotted something incredibly strange occurring in the sky above. Freaked out, he decided to pull out his camera and film what appears to be a beam of light shooting out from behind the clouds at regular intervals. But what is it?

Opinion has been split. Skeptics claim that what the man saw was what is known as a ‘Crown Flash,’ a phenomenon where a cloud’s ice crystals become aligned in the same direction by its magnetic field, causing light from the sun to be refracted, much like a rainbow. However, those with of a more mystical bent have suggested that what the cyclist witnessed was the swift, shifting movement of UFO activity.

What do you think?