ALTON, ENGLAND - JUNE 02: A general view of the Smiler rollercoaster at Alton Towers Resort where two carriages crashed today on June 2, 2015 in Alton, England. Four teenagers have have been seriously injured in a crash between two carriages on the Smiler rollercoaster ride at Alton Towers. Sixteen people were in one carriage while the other one was empty. The West Midlands Ambulance Service said of the 16 on the ride, four had serious leg injuries. (Photo by Christopher Furlong/Getty Images)
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Getty Images News Christopher Furlong