The dreaded grandfather clock

Zion isn't scared of much, but Manuel's sister, Bobbie, has a grandfather clock that he is petrified of. It chimes every 30 minutes and no matter what he's doing or where he is, he sprints to me with all of his might and holds onto my leg for dear life. I place my hand on his back to give him added security and I can feel his heart bounding through his back! I have not idea why he's so scared of that stupid thing.