*starts gathering his Raiton chakra in his abdomen*
When he feels that he has enough chakra for doing this technique, he stops. Now, he stretches out his right palm and starts moving his chakra toward it. When the chakra arrives, he first pictures the the technique in his head and feels like he's ready to perform it. He starts releasing chakra from his hands. Just as the chakra leaves the body, he starts controlling it to shape into a bolt. After a while, the bolt is ready and he looks around and find the senpai's clone, Now, he concentrates and shoot the clone into it's heart, causing it to vanish. As he sees more of the clones coming, he repeats the process a few more times, ending the short "lives" of all of them.
This can be used as the most effective way by shooting the bolts to pierce through the opponent's hear of head. But, can be used in a tricky version, too. You can shoot the bolts toward the opponent's legs, causing him/she to loose balance or/and to fall into your trap.