Simplify the following text for a Grade 9 native English-speaking person.
Original: A â Quick Stopâ motor allows the operator to safely control the ride and ensure safety for the rider ; this feature allows the operator to stop the ride prior to a rider being thrown .
Simplified: A special motor lets the operator to safely control the ride and safety for the rider ; this motor allows the operator to stop the ride before a rider is thrown off the machine .