While waiting for Carrie to come home from the prom, Margaret loses all contact with reality, hiding a butcher knife beneath the folds of her dress. Once Carrie arrives home, having telekinetically destroyed the high school and everything else in the town after falling victim to a cruel prank, both are surprised to find out that they each intend to kill the other. Margaret stabs Carrie in her shoulder. Carrie kills her mother by telekinetically slowing down her heart to a stop; Margaret recites the Lord's Prayer as she dies.