Sixty-four people spent nearly two hours on a stuck roller coaster at Busch Gardens in Tampa, Florida.
The Sheikra suddenly stopped mid-ride Thursday.
Passengers had to be evacuated from the ride.
There was no one physically hurt.
Park officials say they will not reopen roller coaster until they are sure of its safety.
They also say they figured out what caused the malfunction.
Roller coaster leaves 64 people in the air