Demolition University

Demolition University is a 1997 directtovideo action film starring Corey Haim and Ami Dolenz. It is the sequel to 1996 film Demolition High.

As the other students file off the bus, Slater is left by himself. He notes a couple of men who sport machine guns, and watches them, as they perform some type of liquid extraction in their van. Inside the plant, Jenny and Slater stick together Jenny accepts his offer, the pair then notices they get the go ahead for the school trip. The rest of the students and the professor are ordered to the hostage area.Slater and Jenny are forced to evade numerous attacks on them, as they run and hide in various locations around the plant, meanwhile the military start to gather around the perimeter. The pair shouts out to the military but instead get shot at by a terrorist, which starts a shooting frenzy between the military and the terrorists. ........

Source: Wikipedia