The new ride at Alton Towers has been described by the resort as "psychologically terrifying" - and a new ban for under 12s serves to confirm it!
After "unprecedented" feedback from a testing panel, the resort felt compelled to ask for advice from the British Board of Film Classification (BBFC) to to help assess the Nemesis Sub-Terra.
For the first time in the history of theme park attractions, the BBFC agreed to assess Nemesis Sub-Terra, so that Alton Towers Resort could protect its younger visitors from the "intense and disturbing effects of the new attraction" and consider appropriate restrictions.
Until now the BBFC has only rated content in the form of film releases, DVDs/Blu-Ray, digital downloads and video games.
Murray Perkins, Senior Examiner at the BBFC commented: "The BBFC is seeing a real blur of the old boundaries of visual content and physical experience in both 3D and 4D cinema, and at theme parks. Applying our experience of the public's acceptability of moments of threat on screen, to more physical experiences, is something we have begun to do as cinema and other theatrical experiences evolve.
"Nemesis Sub-Terra contains some intense moments, in some respects comparable with scary scenes which may be experienced in horror or science fiction films at '12A'/'12'."
Katherine Duckworth from Alton Towers Resort told Aol Travel: "The classification advice from the BBFC is important for the Resort to ensure the wellbeing of our guests.
"We are aware the enforcements that will now be implemented will mean that many of our younger visitors are unable to experience Nemesis Sub-Terra, which we are obviously concerned about.
"However, the Alton Towers Resort prides itself on offering a variety of rides for all ages and we hope that those under the age of 12 will continue to enjoy our other attractions."
The Nemesis Sub-Terra attraction is described by the resort as "a psychologically and physically thrilling experience, taking place in a dark, intense underground setting and based around the back-story of the original Nemesis attraction, launched in 1994."
It takes guests into a restricted facility deep underground into a system of hidden caves. There is only one "chicken exit" within the attraction - for people who can't cope with the rest of it.
Are your nerves strong enough to take it on? Visit altontowers.com for more information.