The Nightmare Before Christmas

So today I was excited because Calvin finally asked to watch a new movie after having watched Space Jam 300 times in a row. He wanted to watch his old favorite, "The Pumpkin Show." Anyhow, Calvin has become much more observant since he last watched it. As Jack is singing and showing his tricks of removing his head, Calvin has become insistent that I help him take his own head off...hmmmm, what to do???