The signature attack of Dragonball. We first see it performed by Master Roshi, to put out the fire on Mt. Paozu, unfortunately Roshi puts too much power in and blows the mountain away! The attack is charged with cupped hands behind the back, then brought to the front with the arms outstretched, and fired. Goku learns how to do it by watching Roshi do it once. Goku's time to learn the technique was much shorter than Master Roshi's.