Trivia: At one point during the song "Jack's Lament", Jack pops up between two tombstones. The tombstone on the left is a figure from the painting "The Scream", and the tombstone on the right is the horse from Picasso's "Guernica".
Trivia: In the song "This is Halloween," the two children sing "Tender Lumplings everywhere..." This is a reference to a poem from the film's songwriter/composer/Jack's singing voice, Danny Elfman's, former musical theatrical street troupe, The Mystic Knights of the Oingo Boingo (later to evolve as Oingo Boingo.) The original poem, Tender Lumplings, was "And so my tender lumplings, let my welcome hear you now/Into our flesh-pink home of hearts we greet you with a bow/So entertain we must we may, our pleasure from within/The Oingo Boingo treasure chest of lust and mortal sin."
Trivia: Boogie and Santa have the same shadow.
Answer: As seen in the movie, the Fog Juice made it difficult to see anything. Sally had hoped that with no way of seeing where he was going, she would be able to stop him from leaving Halloween Town and save his life.