A signboard outside a restaurant read: "EAT AS MUCH AS U CAN & LET UR GRANDCHILDREN PAY THE BILL." A man entered d restaurant, ate as much as he could & when d waiter gave d bill, he pointed to d signboard and said, "Don't u see? Only my grandchild needs to pay for this bill." The waiter replied calmly, "Actually sir, this is not ur bill. This is ur grandfather's bill!"