When a replay condition is established in advance of a game, a reproduced image which replays a specific scene in the advance of the game is displayed. The improved boot is capable of accommodating articulation of an associated ball stud up to 60 degrees from the rotational center of the joint, as well as twisting motions of the stud of at least 45 degrees. A LED indicator is also typically provided to indicate when the heater is activated. Another method includes calculating a NPV according to a set of equations and displaying the calculated NPV. The ice making device includes a support frame for rotatably supporting at least one ice tray, at least one manipulation button mounted to the support frame such that the manipulation button can be moved forward and backward, and an interlocking unit for rotating the ice tray with respect to the support frame according to the movement of the manipulation button.