Thrill-seekers have been left stuck on a rollercoaster at Alton Towers which previously crashed, seriously injuring five people.
The theme park visitors were on the Smiler when there was a "temporary stoppage" but nobody was injured, a spokeswoman said.
The £18 million ride at the Staffordshire attraction smashed into another carriage on June 2 2015.
Five people were seriously injured in the incident and an investigation found that a computer block stopping the ride because of a stationary car on the track had been over-ridden by staff, causing the crash.
As a result, the full carriage ploughed into the rear of the empty car, leaving two women needing leg amputations.
Merlin Attractions Operations Ltd admitted a breach of health and safety rules over the incident.