I'm kind of surprised no one has mentioned this yet but Thorpe are replacing Se7en with an upcharge horror maze "The Passing" this Halloween. I'm taking the hyping up of this horror maze with a pinch of salt (because it is Merlin!)
The Passing (New for 2012)* - Prepare to be tried, tested and sentenced to death in The Passing, a uniquely interactive, intensely horrifying experience that will terrify even the bravest of thrill-seekers to their core. Using cutting edge techniques never seen before at Thorpe Park, you will experience the suffocating and claustrophobic terror of having your head confined and your sight removed by a hessian body bag as you face the unknown horrors of the after-life. Are you brave enough to book your time to die?
Sounds to me like you'll be doing a standard horror maze with a bag on your head!