Effects of spin

A High Ball is inherently a creative shot, and can have nearly any kind of spin you can imagine. Top quality players use this fact to their advantage in order to control the spin of the ball. For instance, 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 apparently running and leaping just to reach the ball, a good defensive player can still win the point using good High Balls. However, most of the time one will lose the point so it is not recommended unless it is really necessary.
Drop Shot

The drop shot is a high level stroke, used as another variation for close-to-table strokes (like harai and slice). You have to position the racket close to the ball and just let the ball touch it (without any hand movement) in a way that the ball stays close to the net with almost no speed and spin and touches the other side of the table more than twice if the opponent doesn't reach it. This stroke should be used when opponents are far from the table and not prepared to get close to the table. This technique is most usually done by pen-holders and players who use long or short pimples. A very deceiving technique, this could result in the opponent failing to reach the ball after misjudging the distance of the ball. A perfectly executed stroke after a topspin sequence can win a point.