A day of thrills turned into a nightmare at Alton Towers on 2nd June 2015, when what should have been a routine ride on the Smiler Rollercoaster, famed as one of the most intense and scariest rides in the theme park, ended in disaster, when a loaded rollercoaster train collided with an empty test car. The crash left every single rider injured, and for two riders, the impact was life-changing.