well this is even simpler than that, were u use fire element chakra to form large projectiles to shoot at one target for this one you need to use less chakra but more power, you have to almost spit it out and this can be used multiple times to hit multiple targets*places 5 cans along wall* your aim is to hit all 5 of them in one go. concentrate building up the chakra in your mouth and letting it go in spurts