BTW Gero I just re-read your post with Satoshi like a page back saying something about Kato not being able to go through the wall. Just wanted to say that he didn't go "through" the wall. He went "over it."
Its basically pointless to point this out which is basically why I'm pointing it out.
The real reason for posting was to ask a question. If Kato was to use dirt swarm on Satoshi would Satoshi be able to see the chakra being fed through the ground or short distances away? I know that being a Earth user like Kato he probably is used to having dirt in his face but I still feel that he doesn't have a jutsu specifically like Dirt Swarm where small dirt particles are continuously confronting your face, therefore making it relatively difficult for Satoshi to see in the swarm. Just wanted to know before I progressed onward with a post.