Board Thread:Naruto Discussions/@comment-28374870-20160504013153/@comment-9782468-20160508033723

That could just be the case of, he did it so fast that it wasn't noticeable. Which was kind of the point of it anyways. The Rasengan was easier on him because any swirling could be attributed to the Rasengan itself. With the clone, he was fast enough to escape Obito's detection. So he ended the technique and any swirls that would have accompanied it.

Also with the clone, I see none of the trademark poof smoke in the chapter. Obito hit a rock with enough force that some dust shot out of it, and those lines are similar to how most anime artists depict force. But none of the Shadow Clone poof smoke. If it's different in the anime then I have no argument. But in the manga, I don't see any of the poofs.