Why It's Hard: The target slows down, peaks, and then speeds up as it descends, so the velocity is always changing. In addition, to break this target correctly, your barrels will blot out the clay, so you won't see it when you fire.
Mistake to Avoid: Shooting at the top. It's often too far away, it's harder than it looks, and you lessen your chances of hitting a double.
How to Crush It: Catch the target as it's rising, pass it, and press the trigger. Keep the muzzle moving at all times. Maintain a good cheek weld, bend your back to lift the muzzle, and grip the gun lightly so your swing is smooth and fluid.