Slow motion
"Superman" contains large-scale visual effects sequences. The Golden Gate Bridge scale model stood 70 feet long and 20 feet wide. Other miniatures included the Krypton Council Dome and the Hoover Dam. Slow motion was used to simulate the vast amount of water for the Hoover Dam destruction. The Fortress of Solitude was a combination of a full-scale set and matte paintings. The car crashes on the Golden Gate Bridge were a mixture of models and stunt drivers on a disused runway. Young Clark Kent's long-distance football punt was executed with a wooden football loaded into an air blaster placed in the ground. The Superman costume was to be a much darker blue, but the use of blue screen made it transparent.