If you know the nightmare before Christmas like I do then you love the songs but if you listen to the song Jack sings "What's this" when he is in Christmas land he says "what's this, what's this, there's white things in the air?" He shouldn't know what snow is because he said that and because where he lives there is no such thing as snow, but later on in the song he says "the children are throwing snowballs instead of throwing heads". How does he know what snowballs are?