I had just finished making some study notes and was closing windows and getting ready to put the keyboard down for the night...
The computer stopped accepting keyboard input. I have two keyboards: one on my desk and one that is wireless (which has been coming in very handy lately). It would not take input from either keyboard. I rebooted several times and finally pressed the reset button. Fortunately that worked. I really thought I was perhaps locked out of my study notes! Transferring them to the laptop before I go to bed now. There IS a reason I am so anal about having my files in multiple locations...