by cymru1991 » Feb 5th, '08, 22:16
Marvin's magic had a version of that which I still have somewhere (I forget the name). If the effects are the same, there is just shaking, no more. However, it does have to be re-set after each performance, which sometimes requires steady hands, if you get my meaning. (if this is exposure, then please feel free to delete this post).
Incidentally, I checked the Marvin's magic site, and it appears that they don't stock this particular effect any more.

James, 19, Lifelong student of magic and will carry on learning for the rest of my days if I'm a very lucky boy.