Showing One Card (after everyone has folded)

[franknagaijr]

We had a lenghty discussion about this at a Caesar's tourney in Vegas. They call the 'SOSB' rule 'needling', meaning that you cannot perform the action of showing one card with the intention of leaving your opponent wondering if your second card helped.

This is obvious not a universal rule, but enough casinos enforce it that you may wish to discreetly ask the floor before you take up the practice of needling.