This is a good training video from Dr.Neubauer , it contains the demo of side spin lifting in this professional video, the only difference is I use Penhold lift from backhand, basically the forehand lift is also workable in a similar way to kill the ball .
For forehand attack of a top spin ball from a looper, wait until the incoming ball is falling and use a left side spin chop the ball down side way to the table aiming just over the net , this is useful particularly when hitting a high ball tossed by your opponent, a lot of pimple killer tosses you high ball to let you make mistakes .