sentences:  "Bloody GIR", which depicts an image of GIR covered in blood, was created when series creator Jhonen Vasquez illustrated GIR covered in blood and wanted to put this drawing into an episode of "Invader Zim".Nickelodeon, however, prohibited it.Director Steve Ressel and illustrator Chris Graham then snuck the forbidden drawing into a single frame of the episode "Bad, Bad Rubber Piggy".