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Whats the name of a film where a guy learns how to fly a dinosaur? - climbing saddles

When I was younger, I saw a film about a man who was to learn in the school, a dinosaur ride
What I remember is ...
"Theres a Girl
"They live in houses made of stone
"We have to climb a mountain and jump on a massive drop
- It uses an electronic device in practice, and always falls until it dominates
- Set the teachers chair.
Please help to think of killing as
Thanks
-Jake