No, I don't think it would. You see, the wall might *also* be non-corporeal. We would never know for sure. It could be both, and randomly phase in between corporeality and non-corproreality. Then, if you were really unlucky, your head might go in while the wall is coprporeal, and then before you take your head out again, the wall becomes non-corporeal and you become stuck. Or dead.