Funnily enough I was just watching The Real Hustle where they played a game of Nims or something with that name.
Basically you throw a load of matches on the table and the first person picks out 1,2 or 3 matches and places them infront of themselves. Then the next person picks out 1,2 or 3 matches. After this, the first person has to pick out the matches consecutively, so if they picked out 2 matches to begin with, they need to pick out three the next time. I think that was what they are saying
Basically, you win everytime. Until you let them know the secret of how you keep winning and you let them understand the con. Then you play again, and still win.
You talking about something like that? Or things like the rubbish Vegas Card Cheat where you reveal how to do the pass
