Jack started getting sick of Halloween Town and it's daily Halloween Town routine. He's getting tired of the screams of men, women and children. So, he tries something unbelievably new. He gets townsfolk to help. Bad idea. The townsfolk were used to scaring people, didn't understand the meaning of "joyful gifts". So, they made their own gifts. Scary gifts. Jack didn't know.
When Jack was delivering the "presents", dressed as Santa, it turns into something quite... Intense. Military got involved, and his sleigh was shot down, with him, Zero his ghost dog with a glowing pumpkin nose, and the damaged, broken sleigh horses created by the creator of Sally, The Scientist who's name remains undefined, broken and scattered around the graveyard they all landed in. His Santa costume was torn up and damaged so much it wasn't even recognizable. The strands of fabric hung off the remains of the costume as he laid sprawled out on the big book.
Jack landed on the stone-statue angel who's holding the big book in her hands. That statue is you. In stone. Stuck... For now.
Maybe Jack should just stick with Halloween Town.. While Jack was singing his song, still on the book in the statues hand, was interrupted when you suddenly... CAME TO LIFE?!