The effect was very simple. They were known as the "Free Falling Rocks".
Five pairs of vertical rods - two on the left and three on the right- line the sides of the walls between the rock work at the crest of the lift. Each rod had a horizontal stick attached sticking out into the "false track" scene above the ride path. At the end of each stick was a lightweight "rock". They literally dropped down the rods - albeit controlled - with a slight deceleration before reaching the bottom. They then reset before the next train arrived.
If you look carefully today just before passing under the false track level some of the vertical rods are still visible:
Combined with animated lighting projection, moving shadows from the falling rocks, the bulging walls and shaking lamps the effect was quite realistic.
Five pairs of vertical rods - two on the left and three on the right- line the sides of the walls between the rock work at the crest of the lift. Each rod had a horizontal stick attached sticking out into the "false track" scene above the ride path. At the end of each stick was a lightweight "rock". They literally dropped down the rods - albeit controlled - with a slight deceleration before reaching the bottom. They then reset before the next train arrived.
If you look carefully today just before passing under the false track level some of the vertical rods are still visible:
Combined with animated lighting projection, moving shadows from the falling rocks, the bulging walls and shaking lamps the effect was quite realistic.
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