So, I run one site on a largely outdoor haunt called field of screams.

http://www.fieldofscreams.info/

We've done cannibal hillbilles, clowns (very unpopular with my crew, btw), and more but this year the crew wants to do...a torture chamber.

I'm wondering what the professionals of this site have found to be effective, or not effective, in this genre. What works?