The Riverbottom Nightmare Band, also known as "The Nightmare," are the primary antagonists of Emmet Otter's Jug-Band Christmas. The band members include:
- Chuck Stoat on keyboards (performed by Frank Oz)
- Stanley Weasel on guitar (performed by Jerry Nelson)
- Fred Lizard on drums (performed by Richard Hunt)
- Howard Snake on bass (performed by Jim Henson)
- Catfish, for visual interest (performed by Dave Goelz)
When not performing on stage, the band members enjoy breaking traffic laws, riding their snowmobiles, and destroying merchandise. They are the only characters to directly interact with Kermit in his scenes.