This technique creates balls of ki that explode with concussive force. The size of the balls (in addition the amount of their concussive impact) is completely dependent on user’s skill. Beginners can only produce marble-sized balls which have little concussive impact. Advanced users can produce ki bombs ranging up to the size of beach balls, which, when they explode, can smash tree trunks and even metal objects. They are also able to some extent, control the amount of time until it detonates. Skilled users are able to muffle the sound of the detonation to a limited extent and generate explosive energy as streams that respond to their thought directions. They can even reabsorb the energy of non-detonated bombs.