The Jackhammer Massacre

After his best friend Mike dies of a drug overdose, San Fernando Valley businessman Jack Magnus spirals into depression and drug addiction, losing his job, getting a severe infection on his left arm, and becoming homeless, forcing him to live in the warehouse where he works as a security guard. One night, a pair of dealers Jack owes money to break into the warehouse, and decide that since Jack does not have any money, to rob the building, and kill Jack by injecting him with a mixture of Phencyclidine, heroin, and Methamphetamine. Instead of killing Jack, the cocktail of drugs causes him to have a psychotic break, and drilled by paranoid delusions and a hallucination of Mike, he kills the dealers with an electrical jackhammer that was among the tools in the warehouse machine shop.