This is a typical shot where your opponent scratches on purpose, leaving you behind the line to make your next shot harder...just kick it in. (Some rules require a ball in hand behind the line (called the kitchen), and you must hit a cushion past the line to make a legal shot).

Diagram 15
START(%Ap3E5%Cq3D7%Ph7Y9%QQ9X0%RQ7R8%SQ5L0%TQ7D0%UD3Z0%Vj0Y9%Wo0F1%XC1Y6%YD2F2%Zj0Z6%[D4E6%
1E5%]D1P6%^Z2P5%eB5a3%_s3C3%`q1D7%ap1E5)END
Here is a shot that comes up all the time where you might want to use a short kick shot to get better position on the next shot, which could be the 8 ball. (This shot's colored lines look odd, but remember they reference to the banking cushion.)

Diagram 16
START(%Aq3I6%Cq6H4%Ho4L4%Ph7Y9%Qm2Z0%Rq8O7%Sm4O6%Tr2H2%Ur5Y9%Vg2Y8%Wq4K3%Xs5Z0%Ys1J6%Zg9[2%[r7I6%p0I5%]r8L8%^p5L7%eB5a3%_s3C3%`q9F9%aq1I5)END