Though Naruto teaches him a perverted way, he actually made it to Konohamaru learn the steps of making a Rasengan. First is Rotation ( on a pole ) XD
Then there's "power", after that, the "release" XD. Even though he has a lower count of chakra, Konohamaru still idolize the way Naruto uses clone trap.
Ye baby! Rasengan!
The impact astonishes Ebisu.
Onemanga has all the page.