[NYCNative]

Hypothetical situation that has to have occured:

Two players are in the pot for the final action. Player A bets. Player B calls. Player A, evidenly bluffing, instamucks as soon as Player B says "call."

Is Player B obligated to show his hand to win the pot?

If Player B, seeing Player A muck, says something like "You muck? Okay, I win" and then mucks himself, what happens to the pot?