Looking at novels, books and comics is a quick and easy way for Hollywood film studios to come up with ideas without having to do any of their own creative thinking.
Horror movies are great at churning out sequels, and most of the time, each sequel sees the quality dip, the budgets reduced and the original stars moving on to better things.
Hollywood is a fickle business, actors and actresses audition for films on a daily basis only to be refused for a variety of reasons.
Occasionally, actors are cast on films, but when the wheels start turning, it's discovered that they are far from the best person for the role and are sent packing, actors like...
It's been 15 years since Christian Bale brought the serial killer (?) and charismatic, Huey Lewis-obsessed Wall Street yuppie Patrick Bateman to our screens.
People are still debating whether Patrick Bateman actually did kill all those people and went mad from this gory modern masterpiece.