Four guests suffered minor injuries when two carriages on the Disneyland Railroad train ride at Disneyland Paris became separated in an incident on January 2, 2013.
France 24 reports that a bolt connecting the first and second carriages on the train snapped, causing the front part of the train to accelerate ahead of the rest as it pulled into a station. The rear carriages then collided with the front carriage as it came to a stop in the station. The four guests received only minor injuries, but were taken to hospital and later discharged.
Full story: Theme Park Tourist