If you're interested I'm in the process of releasing my "impromptu" version I call RUSSIAN ROZOREO... it uses about 5-10 oreo cookies and a nice double edged razor blade that gets shoved completely into the cream filling until out of sight, mixed up with a bunch of other regular oreos, then you hand them out your spectators and one by one have them shove them in their mouth and take nice big bites...in the end with your "psychic" abilities you find the cookie with the razor blade in it and all is well with the world.
has lots of opportunities for dark humor and comedy, which is why I like it, and it can be set up in minutes and there is like literally no null 0 risk in it screwing up. I just keep the pack of razor blades in my case for razor swallowing and if i have to fill more time I can easily run to the local store and grab a bag of Oreos and do the routine with no pre-set needed. Just a thought I figured I'd toss in the bunch...
I recently saw Keith Barry do the stage version of wayne dobson's smash and stab and it killed, this is another great russian roulette out on the market...