 The model shots of Captain Blue's SPV travelling up the Car-Vu's spiral ramp were made simpler to film by rotating the set rather than the SPV model, thus eliminating the need move the camera or pull the model on wires.The model of Helicopter A42 was filmed upside-down on wires fitted to its underside so as to avoid the spinning blades; footage of the model was then flipped in post-production.A scene in which the President and Captain Brown undergo security checks at the Maximum Security Building was particularly difficult to film as it was essential that the puppet operators, working from an overhead gantry, kept pace with the conveyor belt powering the moving walkway on which the puppets were standing.