Is anyone else surprised we haven't had a single action film based on this scenario? Okay here's the pitch: Bruce Willis is the chemistry teacher, and 3 armed students attempt to go on a killing spree in the school. He kills one with a bunson burner in the science lab, one with a pair of safety scissors in the special needs classroom, and the ringleader he kills at the end by throwing him off the roof and impaling him on the flagpole while the inept cops watch from the parking lot. That'll be $20. You're welcome.