I think the best thing they can do with Thirteen is to get actors dressed as Wraiths inside the building.
They pose like statues until they're about to drop and then HISSSSSSSSSSSSSS! They lurch at the train just before it drops!
There's PLENTY of space for actors inside the building (i was just thinking this idea when I was there yesterday!).
Apart from this idea i only see there being more actors around the area.
It is not safe to add actors to the building, basically because the actors might fall, and that is not good for Alton Towers [-X :yikes:
For a funny thing to do in scarefest, or in oblivion's b-day, just before dropping add: Don't Look Down LOL