When Nicholson stunned DiCaprio with gun stunt

LONDON - Hollywood legend Jack Nicholson provoked a “real” reaction from superstar Leonardo DiCaprio on the sets of “The Departed” by unexpectedly pulling a gun on him during a crucial scene.

The multi-Oscar winning film tells the tale of an undercover cop, played by DiCaprio, who infiltrates a gang led by Nicholson’s crime boss character and one famous scene sees the mobster voice his suspicions of a traitor in his midst.

Director Martin Scorsese reveals Nicholson shocked everyone on the set by deviating from the script and pulling out a weapon to frighten his co-star, reports contactmusic.com.

And even though the sequence was later edited out, Scorsese admits he is still moved every time he sees the “Titanic” star’s reaction on-screen.

“The first thing Jack did was sniff the glass and say, ‘I smell a rat’… And then he pulled a gun on him. He didn’t tell me he had a gun. It was great… we took a lot out, but Leo’s reaction is real-time. I still get chills (when he says) I smell a rat. It’s so real to me,” Scorsese mentions in a new book, “Conversations With Scorsese”.