Idris Elba thought he got shot in the head filming ‘American Gangster’

In an intense case of art imitating death, “American Gangster” director Ridley Scott revealed how Idris Elba thought he’d been shot on the set of the 2007 crime flick — all while using a prop gun without any blanks.

The startling event in question occurred during a scene in which budding drug lord Frank Lucas (Denzel Washington) executes drug dealer Tango (Elba).

However, to elicit a realistic reaction from Elba, 49, the “Blade Runner” director instructed the actor to lean his head against the barrel so he’d be surprised by the recoil. Fortunately, the safety-conscious Scott, 83, employed a plugged-up prop firearm without any blanks to prevent any mishaps — like the case of the late actor Jon-Erik Hexum, who died after discharging a blank pistol against his temple as a gag in 1984.

“I said to Idris, ‘Listen, when he puts the gun to your head, lean on the gun,’ ” the Oscar-winning “Alien” director told the Daily Mail. “Because, by the way, this is a gun with a solid barrel, there is no aperture, I would never risk it — but when you pull the trigger, there’s no blank, nothing.”

Idris Elba attend "The Harder They Fall" World Premiere during the 65th BFI London Film Festival at The Royal Festival Hall on October 06, 2021 in London, England.
Idris Elba attends the world premiere of “The Harder They Fall” Oct. 6 in London.
Eamonn M. McCormack/Getty Images

Elba heeded Scott’s direction, and Washington “pulled the trigger and it goes bang. Idris thought he’d been shot and dropped to the sidewalk and said, ‘I’ve been shot!’ ” per the director’s account.

How did the “Prometheus” director achieve the recoil effect with a blocked barrel and no rounds in the chamber? Paul Biddiss, a movie weaponry adviser who is working with Scott, explained that the director employed something called “a UTM round,” which can go in the barrel of a completely plugged gun and still cause “blowback.”

Ridley Scott attends the 2021 LACMA Art + Film Gala presented by Gucci at Los Angeles County Museum of Art on November 06, 2021 in Los Angeles, California.
Ridley Scott in Los Angeles on Nov. 6.

“It is like a small silver case with compressed air that reacts. It can be used repeatedly for a recoil effect each time,” the armor expert explained. “It’s quite often used in close-up execution shots in films.”

It’s the perfect technique for Scott, whom Biddis described as “hot on safety.”

Unfortunately, prop gun safety has become a major concern following the recent incident involving Alec Baldwin. The embattled actor was slapped with a lawsuit accusing him of purposefully firing the handgun that killed cinematographer Halyna Hutchins on the set of “Rust” in October.

Alec Baldwin is being sued for "intentionally" firing the gun that killed “Rust” cinematographer Halyna Hutchins.
Alec Baldwin is being sued, having been accused of “intentionally” firing a gun that killed “Rust” cinematographer Halyna Hutchins.
Evan Agostini/Invision/AP

“Alec Baldwin intentionally, without just cause or excuse, cocked and fired a loaded gun even though the upcoming scene to be filmed did not call for the cocking and firing of a firearm,” script supervisor Mamie Mitchell claimed in the suit.

She claimed that every firearm safety protocol on set was ignored, such as the presence of live ammunition, and that actions taken that day “were against all industry norms.”

Director of Photography Halyna Hutchins was killed and director Joel Souza was injured on set while filming the movie "Rust" in Santa Fe, New Mexico, on October 21, 2021.
Director of photography Halyna Hutchins was killed and director Joel Souza was injured on set while filming the movie “Rust” in Santa Fe, NM, Oct. 21.
Getty Images for SAGindie