The Ravenous Killer Sleeping Bag is a dark green sleeping bag that is normally not very noticeable.
The Ravenous Killer Sleeping Bag appeared when Hairy Worm was walking along. He started walking in fast motion then was attacked by the sleeping bag. Hairy Worm screamed, Voiceover didn't seem to care. Then the sleeping bag somehow spat Hairy Worm up into the air, who came down into the Hairy Worm Mug. It has been seen on numerous other episodes but has not attacked a character since then.