When you are playing a match, and the opposing team spikes the ball so hard that your player receives the ball but hits the ground and the ball flies back over the net, about 90% of the time the opposing team is going to spike that ball at where you are laying. Use the Right Analog-stick to move your partner to the spot where you were standing, so they can bounce it to you while you are getting up, or hit the ball back over the net.