I learned a trick years ago called jumping jacks. You take the 4 jacks out and then put the a black jack against a red jack (put the backs together) hold each set so you have 2 red jacks facing each other and the 2 black with be "outboard". You tell a story about how the red jacks are in the shade and the blacks are out in the sun and the only way they can change is for the wind to blow. Then you blow between the 2 red jacks and magically they switch places with the black jacks. Don't know if this is the trick you were thinking of. Sort of simple and easy to do, but with practice and flair it looks pretty good.