Phantom Heart

Phantom Heart

An empty film container is displayed and then capped.  Three            
  plastic cards are displayed, one with a square on it, one with a 
  circle, and one with a heart.  The spectator selects one.  Let's 
  say the heart.  The film container, still empty, is shaken.  A thud 
  is heard and upon opening the container a wooden HEART is spilled 
  on to the table.