My girlfriend was burning a few picture CDs next to me with her Macbook when all of a sudden she got excited. She accidentally put two CD-R's into her Macbook. On the desktop two icons appeared... "CD 1" and "CD 2." She hit eject and one CD popped out. She hit eject again and the second one followed. Both CDs came out unscratched and the optical drive still works fine. Is this normal? I tried to find information about it, but failed. Don't really want to try it again in case it was some weird fluke.