Harry Shearer, a regular Simpsons voice actor, is also a member of Spinal Tap. He plays himself in this episode along with the rest of the band.
The scary story Otto told Lisa is similar to High Beams from Scary Stories to Tell In The Dark.
Bart's guitar is left-handed when he is learning how to play it, yet Otto can play it perfectly on the bus despite being right-handed. Later, when Otto is playing guitar with Bart in the garage, the guitar switches between being a left-handed model played righty by Otto, to a right-handed model, all in the same scene.