In 1974, RockSlide became the latest filmmaking demonstration added to the Studio Tour. Based  loosely on the hit film Earthquake, the tram would stop along a rocky hillside when suddenly the earth grumbles and styrofoam boulders rolled down toward the trams. The boulders would be gathered by a metal scoop bucket and then transported back up the hill and placed on a tilting platform. The scoop would then lower back to the bottom of the hill. The entire process was supposed to take 90 seconds. At least that was the idea. RockSlide never really worked. The scoop mechanism was very slow and was not able to keep pace with the trams. If the hillside was wet, the rocks absorbed the water and would spray the visitors as they slammed into the bottom of the hill. When the hillside was dry, the rocks would bounce into the trams and create havoc. A far more sophisticated and convincing display was the Collapsing Bridge. As the tram approached a dilapidated bridge, the tour guide suggested to the driver that they drive around it. However, the driver does not listen and took the guests over the bridge. When the tram reached the half-way point, the bridge began to creak and timbers started to fall away. All of a sudden, the deck of the bridge dropped a few inches, giving the visitors a scare. As the tram pulled away, visitors could see the bridge reset itself. The set was designed using a computer control system built by Antioch and hydraulic lifts like those found in an elevator.Another tour enhancement was The Runaway Train. Added in 1974, the tram would approach a railroad crossing and stop with the center car over the tracks. Suddenly, off in the distance a the loud chug of a steam train and its distinctive whistle could be heard. The wiggle waggle warning light next to the tram goes berserk. Then the visitors see it. Bearing down on the tram at seven miles per hours was a nine-ton locomotive. Fortunately, the train stops inches from the tram. 
The effect took four months to build. The locomotive was powered by air motors with two braking systems. Like the Collapsing Bridge, visitors could see the show reset as they drove away. Behind them, the locomotive would quietly roll back to its hidden position. The gag could be repeated every two minutes. The new attractions helped to bring 1.816 million visitors to the Studio Tour in 1974.