Remember the monkey selfie case? The one where a macaque in Indonesia named Naruto got ahold of a wildlife photographer’s camera and took a series of fabulous selfies, sparking an unlikely copyright fight? “On appeal, the crazy got crazier,” a lawyer for photographer David Slater says.

People for the Ethical Treatment of Animals filed suit in San Francisco federal court on Naruto’s behalf last year, arguing that the monkey is the “author” of the photos, and therefore should own the copyright.