Round and Round
STUNTS - chapter 9, page 1010
This quirky flourish is almost impossible to adequately describe, so I hope the clip helps. I like to preface this move with the old one-hand flourish that I believe was known as Around the World. With the deck in dealing position, the top card is slid off the deck to the left, maneuvered around the edge and under the deck, then slid around the right edge of the deck and back on top. The flourish is a good followup as you say, "Ever see this move done simultaneously with both hands?"
I feel that the flourish is enhanced if both hands lift their halves about 6" during the action. As with Five Inches Above the Deck, the flourish makes a stronger impression if you only do it once and quickly move on to the next move or stunt.