You know what? When WILDing, you go through many hallucinations. These are all natural. What may happen is that, because of these hallucinations, you don't even notice you're into SP. To me, SP seems more like I was out of my body rather than being unable to move it. It's as if, instead of feeling my real body, I felt my dream body.

The hallucinations are not remotely scary, just a bit senseless (but then again, any dream is senseless). So don't worry about it. It's as if the hallucinations were different, shattered dream images. They must happen in order for your mind to pick one and make it a full-blown dream.