I photoread another book just last night, and immediately afterwards noticed that my eyes were hurting. They had never done that, so I closed them to try to relax them some. After having my eyes closed for a few seconds, I noticed my eyes were starting to move around. Then they went ballistic and started moving in a "z", over and over, faster and faster. It was kind of like they were skittering through the book, but at a much faster rate than I have ever done it. I didn't see anything in my eyelids, just black, empty nothing. Has anybody else experienced anything like this? Or am I just going insane?