I won't use this every day in every circumstance, but at the right time and place you have a
miracle. The design is well thought out with, I think, one glaring exception. Although the trick can
be performed without it, incorporating black art transforms a puzzle into a miracle. That the entire
case is black rather than only the "secret stuff" that needs to be concealed via black art means
that the entire prop disappears into the void rather than just that which you don't want the
audience to see. If, for example, the top of the case had been a different color, the effect would
"pop" better and the black art would be more effective. I had my wife put red tape on the top and
the trick is now MUCH more visual and more effective.