Wind Release: Drilling Air Bullet

A technique used by Shukaku of the Sand. Shukaku will first take a deep breath, and then pound his stomach to apply external pressure, the power of which he uses to shoot a highly compressed air ball from his mouth. The expelled air ball is mighty enough to hollow out the ground, and level an entire forest. Because of the large quantity of chakra kneaded into it, it explodes the moment it reaches its target, dealing an enormous amount of damage.

Trivia

 * Shukaku is the only tailed beast known to use an actual jutsu as it's form of projectile. All other tailed beasts instead gather raw chakra to form Menacing Balls.