I knew the minute I stopped expecting the shark, the minute I took my mind off the idea of shark, like a watched pot, that’s when a shark would appear, and since I didn’t want to miss that appearance, I kept my mind focused on the water, trying not to think about anything other than water, but I must have been thinking something, and I must have been in the middle of thinking it when a white underbelly flashed by, huge and white and slightly above me, and then suddenly the bait, which had been floating in the water, was gone.