I am having trouble understanding the rules regarding autonomous body parts. For example, "my eyes floated above the treetops as we passed," is obviously bad writing. Of course your eyes didn't pop out of your head and float above the trees. Sometimes these issues are not quite as obvious. For example, "I put my hand on her knee." Some might argue that the narrator picked up his severed hand, placed it on a person's knee, and just walked away. Of course, "I reached out and touched her knee," works better, but I've seen this done both ways.