Beware the ice

I went to the Wales Millennium Centre tonight to see a play called The Frozen Scream. It starts out as a 1920s ghost story, but then goes all post-modern. The play was interrupted, and we were told to evacuate the building (we had to go through backstage to a carpark). Then we moved somewhere else. Here they told us about the book the play was based on being cursed. We moved around a few more times, then the actors finish the play within a play in the cafe. 
It was quite good fun - they had created a website about the book and the curse which we were told to look at. But after walking to the 4th or 5th different room through corridors, it got on my nerves a bit. Some people loved it though.