A snap hook is more destructive than even a slice--it runs hotter and travels farther along the ground, making it difficult to keep your ball in play.
If you're prone to hitting more than a few snipes, it's likely you're coming up out of your spine angle--your forward tilt toward the ground--as you near impact. Your hips slide toward the target instead of rotating, and your weight hangs back, causing you to release the club early and close the face. This early release and lack of body rotation leads to a hook. Here are two drills to help prevent you from losing your spine angle at impact so you can stop the snap.
1. Widen your stance Take your normal driver setup and slide your right foot several inches away from the target. This will lower your right shoulder and your body's center of gravity. Hit several balls with a three-quarter length swing. From this super-wide stance, you'll have a much easier time staying down through the shot.
2. Grip down Using a 6-iron, tee up a ball and grip down several inches to the metal part of the shaft. Take your normal stance and swing away. To make solid contact, you'll need to keep your butt down and your hands low. Raise either and you'll miss the ball entirely or hit it thin.