This is most likely a case of the brain making sense out of a pattern. I had a fall from a ladder while cutting branches from a tree in my back garden. After getting up and assessing damage i had a huge swelling on my left elbow. After ensuring there were no broken bones (the ladder wasn't so lucky) I continued pruning and then mowed the front and back gardens. Later I went into the house to clean up. My wife looked at the injury and panicked, she was sure it was broken and I explained I had full range of motion. After showering I looked at the injury in the mirror. On the bruised tissue there seemed to be squiggly marks, similar to Arabic writing. Additionally, there appeared to be Arabic numbers, "8251." The markings were not visible to the naked eye, but only in the mirror. I asked my wife to look at it. She couldn't see anything besides the bruising, cuts and scrapes until she looked at it reflected in the mirror. The writing appears to be oriented correctly in the reflection which would mean it would be "printed" in reverse in the bruising. Again, I write it off as the brain making sense out of patterns. I'm off to climb up again to paint the gables of my house. I'll follow up if there's any more "messages."