Arnold Schwarzenegger pranks fans, and they freak out!

Actor Arnold Schwarzenegger was spotted pranking his fans at the Madame Tussauds wax museum in Hollywood, and their reactions are going viral.

The stunt had the double goal to raise money for charity and promote his latest Terminator movie. Arnold, dressed up as his undefeatable character, posed still with the museum visitors, waiting for the perfect moment to surprise them while they were taking pictures of the fake "statue".

Some of them were very suspicious while others simply freaked out:

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