Packetrainer by Phil Goldstein

Focus by Phil Goldstein 1990
Page 73 et seq.

Personal Comment: This routine is fun. It is cute, the effect is clear, even though I personally would change the method a bit, but as an impromptu trick using just four cards this stands out as one of the better tricks. Let me explain: The effect is the same many, many times during the routine. But this is not what is important. The story here is what matters. Card turning over hearing a special command, that is cool from a spectator's point of view. I like it. Something about it makes me love this trick.

Difficulty 2/5