Show & Tell + Bluffing

Scenario:
I am playing show&tell. My opponent is playing Deadguy Ale (B/W stuff) and has a Dark Confidant in play. He reveals an oblivion ring of his confidant.
I only have lands in play and show and tell in hand.

I would like to cast show&tell and choose nothing, hoping that my opponent puts his o-ring into play and has to exile his dark confidant.
I see the following possibilities:

• I shuffle around my cards until my opponent puts aside a card. I then tell him I am not putting anything into play. My opponent can tell me he was still thinking as I did not ask for confirmation. I could ask him for confirmation, but that would make it obvious I am not putting anything into play since I do not have a card in front of me. My opponent does not fall for my cunning trap.
  
• I set aside a random card, and when my opponent has put aside a card I tell him I am not putting anything into play. My opponent could tell me exactly the same, claiming he did the same move I did.
  
• I make it clear I am not putting anything into play. My opponent puts a land into play and is wondering what I am doing...
  

Is this just not possible in real life magic, even though you can easily do it on MTGO (yes, I am aware that MTGO is not the same as paper magic).

Je te suggérerais de proposer à ton adversaire d'écrire sur un bout de la carte que vous comptez mettre en jeu. Tu peux alors écrire très clairement "Pas de carte".