Build a movie plot around this: Who breaks her spine at the end of the movie? Regina.
A:
Sixteen-year-old homeschooled Cady Heron (Lindsay Lohan) and her zoologist parents (Ana Gasteyer and Neil Flynn) return to the United States after a research trip in Africa, settling down in Evanston, Illinois. Attending a public school for the first time, Cady meets new classmates Janis (Lizzy Caplan) and Damian (Daniel Franzese). The two warn Cady to avoid the school's most popular clique, the "Plastics", who are led by queen bee Regina George (Rachel McAdams) and include rich but insecure Gretchen Wieners (Lacey Chabert) and sweet airhead Karen Smith (Amanda Seyfried). The Plastics take an interest in Cady, and invite her to sit with them at lunch. Seeing that Cady is getting along with the Plastics, Janis hatches a plan of revenge against Regina for some past slight, using Cady as the infiltrator.Cady soon learns about Regina's "Burn Book", a journal filled with rumors, secrets, and gossip about the other girls and some teachers at school. Despite this discovery, Cady decides to forgo Janis's scheme for ethical reasons. Meanwhile, Cady begins to have a crush on Regina's ex-boyfriend, Aaron Samuels (Jonathan Bennett), whom a jealous Regina proceeds to steal back at a Halloween party in front of Cady. This spurs Cady to fully commit to Janis's plan to cut off Regina's "resources", which involve breaking Regina and Aaron up, tricking her into eating nutrition bars that actually make her gain weight, and turning Regina's fellow Plastics against her. In the process, Cady unwittingly remakes herself in Regina's image, becoming spiteful and superficial, and abandons Janis and Damian.When Regina is finally made aware of Cady's treachery, she retaliates by spreading the contents of her Burn Book all over the school, quickly inciting a riot. To avoid suspicion, Regina inserts a fake libel of herself in the book in order to blame Cady, Gretchen, and Karen, the only female students not mentioned in the book. Principal Duvall (Tim Meadows) soon quells the riot, and gathers all the girls in the school in the...