At the onset of what he later learned was a migraine headache, David Friedman subconsciously typed in tongues on his laptop.
Again, my fingers were typing nonsense. Could I have made the same mistake twice? No, I was definitely starting out in the correct position. I watched my fingers move as I typed. Nothing looked wrong. The sensation was just as familiar as any other time I typed. My fingers moved with the same confidence, as though they knew exactly where they were going to reach the letters they needed to hit. And yet: gibberish on the screen.
Don't miss the cliffhanger in the final paragraphs.