Two Knee Drill (20 passes). The purpose of this drill is to warm up the arm and, at the same time, teach concentration on target and ball release. Pair off about ten yards apart directly in line with each another, kneeling on both knees. Receiver will hold both hands up, giving the QB a target to throw to.ne Knee Drill (20 passes). Put your knee on the throwing side down. Place the ball on the ground, grip it with just the throwing hand, lift it up with one hand, cock it high with two hands, and throw it to partner. Exaggerate your follow through as if to pick up grass. Use the arm only and lead with elbow.