Via Starpulse:

Jack Nicholson tormented his co-star Leonardo DiCaprio with a fire extinguisher and a threat to set him on fire during one intimidation scene in new movie The Departed. The movie veteran was disappointed with his own performance as a villainous mob boss in the film and decided he had to take measures to get the best out of his character and that of co-star DiCaprio...

"In the scene, my character is sitting across the table from a homicidal maniac, who will maybe light me on fire! It gave my character a whole new dynamic and shifted the scene in a different direction."

Apparently the experience was so traumatic that DiCaprio is now hiding from Nicholson, disguised as Eddie Izzard.

If you don't want to wait until The Departed premieres, rent the movie it's based on, the Hong Kong gangster/cop thriller Infernal Affairs. Action, suspense, drama, and best of all: no Boston accents.

(thx michelle)