Ah, one of the classic monster stories. And no, it is not the one where the planes, eh Wonderbolts killed the Beast. Indeed those got crushed by her. It's the one where the Mother arrives and is unstoppable!
Luna: Are you Spike's mother? Spike: Oh hey Luna! Spike's Mom: That depends, do you have anything you'd like to share with me. Luna: Indeed, do you happen to know of a lovesick bear chasing the young draon around? Spike's Mom: OoO"