Arnold Schwarzenegger pranks fans as wax Terminator at Madame Tussauds

ActionmovieiconArnold Schwarzeneggergave fans more action than they were expecting during a prank atMadame TussaudsinHollywood, Calif.

Video of the stunt, posted Wednesdayon the actor's YouTube account, shows unsuspecting guests posing with what they thought was a wax version of the Terminator,only to have him come to life.

"What's the matter?" asks Schwarzeneggerafter hissudden movements send two women running, screaming across the museum floor.

The stunt wasdesigned tobring attention to a U.S.youthempowerment charity,After-School All-Stars.

Arnold vs. Arnold

It also saw the67-year-old former governor of California take an in-character walk around Hollywood, where heinterruptedan Arnoldimpersonator posing with a group of tourists.

"Who are you?" asksthe real Arnold.

"I'm the Terminator," repliesthe imposter posing as the legendarycyborg assassin.

The scene unfolds with theleather-wearing rivals squaring off in an Austrian accent competition using Schwarzenegger's signature catch phrase, "I'll be back."

Schwarzenegger is also ramping up promotion for Terminator Genisys.

• Arnold Schwarzenegger is back in Terminator Genisys trailer

The highly-anticipated seriesreboot ofJames Cameron's original 1984 film is due outon July1.

Director Alan Taylor (Thor: The Dark World)is at the helm of the science fictionthriller,which is intended to be thefirst film in a new trilogy.

TheTerminatorfranchise has already earned $1.4 billion US.