Photos from Robert Downey Jr.'s Best Roles

In this 2005 dark comedy, Downey plays Harry Lockhart, a thief who stumbles upon an acting auditions while evading the cops.

His emotional breakdown convinces casting he's a method actor perfect for the part, and he is hilariously set up with a real private investigator (Val Kilmer) to shadow him to learn the part.

However, total chaos ensues, including chopped off fingers and a staggering body count.