I was just wondering if anyone knows if there is a marketed variation of the "Russian Roulette" with a knife illusion, except have it so for the final stage, the magician slams his/her hand down on the cup containing the knife, but the knife is gone, and can be retrieved from anywhere else? Thanks for any pointers.

Would this be a logical step to take the effect to?

(Also is this in the wrong section!!)

I couldn't find which section this should be posted in - any hints please? I've put the same post in another section (the gospel magic section). Sorry.