The Sliding Shoot is a similar shoot to the Catapult Shoot. Your left elbow must be bent, and when launching make sure your shooter is on an angle parallel to the Beystadium. You then push your left hand forward and your right straight back. This shoot creates a Banking pattern where your bey moves in a flower like pattern.
It is also important to note that when first performing this technique, you must be positioned directly across from a wall so that your Beyblade will not bounce out of the stadium right at the beginning of the battle. When you have mastered the technique, the Beyblade should not even touch the wall as this will drain its stamina.
Beyblade Lesson Sliding Shoot
This video shows how to perform the sliding shoot.