Matthew Twining

Common-type aquatic leeches grow to large size after feeding on steroid-laced blood of a number of college endurance swimmers, and then the nasty creatures lay siege to the entire campus for more. (imdb)

It's Corey Peterson's first day at Hallow End High School when he discovers that there's a rash of murders occuring on campus. It's a battle of jocks versus the geeks and Corey is forced to choose sides. (imdb)