Stop motion animation was used for the shot of the German fighter’s wings breaking off as it crashes through the tunnel. The tunnel was a 210 feet model that occupied 14 of ILM’s parking spaces for two months. It was built in eight-foot sections, with hinges allowing each section to be opened to film through. Harrison Ford and Sean Connery were filmed against bluescreen; the sequence required their car to have a dirty windscreen, but to make the integration easier this was removed and later composited into the shot. Dust and shadows were animated onto shots of the plane miniature to make it appear as if it disturbed rocks and dirt before it exploded.