This is a great effect that rides on the mystery and the great talents attributed to Houdini. You show an animated picture of Houdini shackled up in chains and a picture of solid wall. You make Houdini pass through the wall and when he comes out from the other side of the wall he is free of his shackles.
No gimmicked silks. Everything can be inspected before and after the performance.
The Houdini silks measure about 9" x 9" and the wall silk measures about 18" x 18".