Restaurant signboard

A signboard outside a restaurant read "eat as much as you can, your grand children will pay the Bill"... A man entered the restaurant and ate as he could, got a toothpick and was relaxing when the waiter gave him the bill he laughed and pointed to the signboard, don't you see, "only my grandchildren will pay" The waiter replied, "This is not your bill, it's your grandfather's Bill"........the man fainted.... Don't laugh alone.....🍵🍴🍧