The Return of the Living Dead (1985)

Synopsis
Middle-aged family man Frank (Jim Karen) trains teenaged Freddy (Thom Matthews) for his new job at a medical supply warehouse. In an effort to impress and frighten his young charge, practical joker Frank reveals that the warehouse basement contains a cannister full of a mysterious chemical capable of bringing the dead back to life. It seems that the cannister fell off the back of an army truck during an accidental outbreak of zombiedom. Frank and Freddy unwittingly inhale the chemical and release it into the warehouse. Turning to the operator of a nearby crematorium for help in destroying the suddenly undead specimens that surround them, they unwittingly awaken the residents of a nearby cemetary just as Freddy's pals arrive to party amidst the headstones and wait for their friend's shift to end. Meanwhile, Col. Glover (Jonathan Terry) waits for the call that his missing chemical weapon has been unleashed. ~ Brian J. Dillard, All Movie Guide