BOSTON ( MainStreet) -- Don't be afraid of things that go bump in the night.Horror movie hatchet men, nightmare manipulators, killer sharks and blood-sucking caped creeps have long been doing their part to fuel the economy. Decade after decade, Hollywood has found fun and profit with scary movies that range from psychological thrillers to gory splatter fests. Its biggest successes have often come from low-budget affairs that have become word-of-mouth hits. The Blair Witch Project turned a $20,000 investment into $250 million in ticket sales when it was released in 1999. Paranormal Activity in 2007 was made for a mere $11,000, took in $183 million in worldwide receipts and spawned two sequels. Made for just $325,000, the original Halloween in 1978 had a domestic gross of $47 million and a slew of sequels. With the actual Halloween fast approaching, we took at five ways horror movies have been scaring up cash and affecting the economy.