Timing is everything for a stuntman, and just in time for the 30th anniversary of 'Raiders of the Lost Ark,' Vic Armstrong, who doubled for Harrison Ford on the iconic film, shares the story behind some of those classic scenes in his new memoir, 'The True Adventures of World's Greatest Stuntman.'

The British-born Armstrong, who'd already doubled for Roger Moore in 'Live and Let Die' and Christopher Reeve in 'Superman,' was such a dead ringer for Ford that Steven Spielberg and even Ford's own son mistook him for the star at one point. He went on to double Ford in the next two Indiana Jones films, and design and execute some of the series' most famous stunts.

Armstrong told Moviefone his thoughts about working with Ford and Spielberg again on a fifth Indy film and why 'Raiders' has stood the test of time.