This is a video tutorial only. No props are included.
 
This is my handling of the classic "Coin Funnel" prop. 
 
In this video I use "The Tunnel" manufactured by TCC Magic. The handling can work with some other versions of the prop as well.
 
Three coins mysteriously fall through a black hole. The power of the black hole is contained within a sturdy brass tube. In the end, all is revealed with a surprise twist!