Alligator

A teenage girl purchases a baby American alligator while on vacation with her family at a tourist trap in Florida. After the family returns home to Chicago, the alligator is flushed down the family's toilet by her surly, animal-phobic father and ends up in the city's sewers. The alligator survives by feeding on covertly discarded pet carcasses. The story quickly garners public attention, and a citywide hunt for the monster is called for. The gator goes on a rampage through a high-society wedding party hosted at a mansion.