Sunday evening, two old friends are driving and riding along the Old Glenrock Highway on the way to Dori Lou's for some dinner, and a rainbow begins to form at the eastern end of Casper Mountain. The passenger says, "Hey, look what the sunset's making." Driver says, "Let's go see if we can drive under it." Passenger replies, "You testing me? Because you can't drive under a rainbow."  Instead of going directly to the restaurant, the driver goes down Hat Six Road, and the rainbow does seem to get bigger and brighter. It completes a perfect arch as they stop to take pictures.