I highly recommend not moving a fork, because its a dead giveaway, a magnetic ring is something that can be used for some awesome effects, but moving a fork tells the audience member that the ring you decided to start wearing the other day is magnetic. If you can find it cap through bottle, would be good and coin through bottle is also a good one. I have done a cap through bottle trick in Mexico and it worked out brilliantly. Anyways a coin matrix variation could be and has been done. Matter a fact I know the guy who made my ring really well and his ring was used in Pen and Teller fool us but he didn't fool them because they know about the ring themselves. Anyways back on track, haunted deck isn't done with a magnetic ring so you cant do that, and I have never heard of a penetrating coin through deck using a magnetic ring, but other than that Good Luck!