Last year I did an 'out of this world' with pictures of people, on the back was a name and either 'living' or 'dead'. I followed this by giving the audience a 'free' choice of a dead person (which I never saw) and moving onto a ouija presentation with letter cards and a short glass in which the spirit spelt out their name from the face down cards (so no-one could influence where it went

), needless to say it was the same name as the picture they had chosen.
All pretty easy stuff, but when dressed up, and as long as you are prepared to take your time over the ouija bit, quite effective.
For gore I used a variation of Marc Spellman's 'The Afflicted' in which the second wound was devined, not by piercing a piece of paper but with needle through arm instead.
Cogito, ergo sum.
Cogito sumere potum alterum.