Two roller coaster carriages collided at Blackpool Pleasure Beach when one of them became jammed on the rails, police have said.
Thirty people were injured when the second carriage crashed into the back of the first car on the Big Dipper ride on Tuesday evening.
Up to 21 people were taken to Blackpool Victoria Hospital with facial, back and neck injuries.
This mobile phone video, sent to the BBC, shows the rescue effort in the aftermath of the crash.
Mark Alderson, Station Manager of South Shore fire station, describes the rescue effort.
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