Release Message:  Three cylindrical prongs at one end which then mysteriously transform into two rectangular prongs at the other end.

Description:  An impossible trident also known as an impossible fork, a blivet, poiuyt, devil's tuning fork, etc., is a drawing of an impossible object (undecipherable figure), a kind of an optical illusion. It appears to have three cylindrical prongs at one end which then mysteriously transform into two rectangular prongs at the other end. . "A New Ambiguous Figure: A Three-Stick Clevis." Amer. J. Psychol.