Wind Release: Explosive Air Pockets

With a single hand movement the user can cause the air at multiple points around themselves to contract and then rapidly expand, creating a concussive force of air. The "blast" is a large sphere shape, roughly the size of a beach ball. The impact is akin to being hit with a very hard physical strike, and is mainly used to knock an opponent away or down. Since it can of course move things other then a person it could be used to defend against things as well, projectiles for instance.