Coinvexed Third Generation by David Penn and World Magic Shop - Trick"The FINAL answer in coin bending!" Morgan Strebler When David Penn released his Coinvexed coin bending gimmick, it established itself as the number one choice for professional magicians and mentalists all over the world. Coinvexed Third Generation takes the project even further with an improved gimmick and a download featuring three real world working routines. In David Penn's double coin bend routine, a spectator signs a coin, which can be borrowed.