 In standard gin, only a player with 10 or fewer points of deadwood may knock.Knocking with 0 points of deadwood is known as "going Gin" or having a "Gin hand", while knocking with deadwood points is known as "going down".To knock, the knocking player discards as usual, announces knocking (generally by simply placing a discard face down), and the hand is laid out with the melds clearly indicated and deadwood separated.