Take your guard stance a step back from the bag with your hands wrapped and gloves on.

Give the bag a light push with your lead hand so it swings away and comes back toward you.

As it swings back, slip to the side by bending your knees and rotating your torso so your head moves off the line of the bag.

As you come back up, fire a cross or a jab-cross at the bag as a counter.

Reset your stance and repeat, alternating slipping to the left and right.