to the table, in some cases having so much backspin that the ball actually rises. Such a chop can be extremely difficult to return due to its enormous amount of backspin. Some defensive players can also impart no-spin or sidespin variations of the chop. Some famous choppers include Joo Sae-hyuk and Wu Yang. Block A block is executed by simply placing the racket in front of the ball right after the ball bounces; thus, the ball rebounds back toward the opponent with nearly as much energy as it came in with. This requires precision, since the ball's spin, speed, and location all influence the correct angle of a block. It is very possible for an opponent to execute a perfect loop, drive, or smash, only to have the blocked shot come back just as fast. Due to the power involved in offensive strokes, often an opponent simply cannot recover quickly enough to return the blocked shot, especially if the block is aimed at an unexpected side of the table. Blocks almost always produce the same spin as was received, many times topspin. Lob The defensive lob propels the ball about five metres in height, only to land on the opponent's side of the table with great amounts of spin. The stroke itself consists of lifting the ball to an enormous height before it falls back to the opponent's side of the table. A lob can have nearly any kind of spin. Though the opponent may smash the ball hard and fast, a good defensive lob could be more difficult to return due to the unpredictability and heavy amounts of the spin on the ball. Thus, though backed off the table by tens of feet and running to reach the ball, a good defensive player can still win the point using good lobs. The lob is used less frequently by professional players. A notable exception is Michael Maze. Effects of spin Adding spin onto the ball causes major changes in table tennis gameplay. Although nearly every stroke or serve creates some kind of spin, understanding the individual types of spin allows players to defend against and use different spins effectively. Backspin Backspin is where the bottom half of the ball is rotating away from the player, and is imparted by striking the base of the ball with a downward movement. At the professional level, backspin is usually used defensively in order