Sweating Cards = Dead Hand?

[bapazian]

I witnessed this hand recently at a home game, a 1/2 NL 100 Max 100Min. Tag player open raises for 10 3 players to the flop including the fishy host who is somewhere between LAP and LPP.

TAG bets 20 and Host shoves for 70 total.

TAG tanks completely and after a while looks about to fold. He lifts his hand up and shows it to the player sitting to his right (Host is on his left). The player he shows the cards to says "I know exactly what I'd do with those" with some confidence.

After this happens the TAG thinks for 25seconds or so then calls. Immediately after the TAG says call the host flips saying that only one person can be to a hand and the hand is dead and he scoops the money.

TAG player starts to argue but immediately (and smartly so imo) decides that the host is right.

Since the host was a fish and it was a good game that will continue to be good in the future I think the tag made a good decision by not arguing in this relatively small pot.

I am curios though as to what an official ruling would be on this hand if it occurred in the casino though. Comments ar welcome!