A dazzling "fire rainbow" was sighted in the sky over South Carolina on Sunday August 16, 2015, astonishing onlookers before fading away into nothingness. Despite the phenomena being called a "fire rainbow," it's no burning blaze. The rare display, known as circumhorizontal arcs, appears when light from the sun hits tiny ice crystals embedded in cirrus clouds at a very high altitude. Witnesses called the event inspirational with one woman saying it reminded her of a dearly departed close friend. "I’m sure she came to visit us," the woman said.