"There are two kinds of angry people in this world: explosive and implosive. Explosive, which is the most common, is the type of individual you see screaming at a grocery store cashier for not taking his coupon. Implosive, the least common, is the cashier at the store who remains quiet at his job day after day until he then finally loses it and just shoots everyone in the store.
You're the cashier."
epic quote is epic, but from which movie?...;)