Other mistake: When Jack first arrives in Christmas Land he doesn't know what is falling from the sky (snow) but he somehow knows that the children are throwing snowballs.
The Nightmare Before Christmas (1993)
Trailers
Directed by: Henry Selick
Starring: Catherine O'Hara, Chris Sarandon, William Hickey, Danny Elfman
More trailers
More mistakes in The Nightmare Before ChristmasMore quotes from The Nightmare Before Christmas
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".
Question: How did Jack save Sally and Santa Claus in Oogie Boogie's lair by transporting them from the lava pit to the Iron Maiden? Wouldn't they be killed by the Iron Maiden?
Answer: Except they're a reanimated corpse and a skeleton. They are either already dead (or undead), or, given how things seem to work, the normal natural laws don't apply to Halloweentown.
Greg Dwyer
But how did Santa survive the Iron Maiden? Especially with how big he is, he certainly would have been killed.
You're trying to apply the rules of the real world to fictional magical beings.
LorgSkyegon