The Ambassador’s bodyguard quaked at the sight of the uniformed skeletons guarding the main gates of the royal palace. "Don’t be afraid," the Ambassador said. "They are King’s Bones, the monarch’s personal bodyguards, and are no threat to us unless we were to do something stupid like trying to attack His Majesty."
Atheists and agnostics get a jolt when one or more deities make an appearance, and take a direct interest in things. It is hard to deny the existence of gods when one has met them face to face.