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Psychologists set to unveil 'the most terrifying roller coaster ever', using scientific know-how to scare thrill-seekers (and giant hypodermic needles!) | Alton towers rides, Roller coaster, Thrill ride
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The Smiler Roller Coaster Ride at Alton Towers Theme Park near Cheadle Staffordshire England United Kingdom UK Stock Photo - Alamy
![Alton Towers' Smiler rollercoaster leaves thrillseekers trapped upside down for 30 minutes - a year after horrific accident | The Sun Alton Towers' Smiler rollercoaster leaves thrillseekers trapped upside down for 30 minutes - a year after horrific accident | The Sun](https://www.thesun.co.uk/wp-content/uploads/2016/09/nintchdbpict000263441291.jpg)
Alton Towers' Smiler rollercoaster leaves thrillseekers trapped upside down for 30 minutes - a year after horrific accident | The Sun
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