A post for the Avalanche blog. When I was very young, somewhere between the ages of 3 to 5, I wanted to be a shark when I grew up. But my mom tells me I was terrified of going into water, including the bathtub. Now, thanks to Planet Earth and Youtube, it all makes sense. Of course I didn't want to be a regular old water-bound shark. I was planning to become one of those amazing flying sharks. Alas, my dreams were never realized, but I do occasionally creep up on my children in the swimming…