All I had to do was go out and perform. One of the hardest things was doing those back flips, where you had to jump up and land on the top rope. It's precision movement.
Everything is about your movements and precision and timing, which is what gymnastics is about.
I've been accused of being a shell designer - you start with a machine and enclose it. But in many cases, the shell is essential. A locomotive without a shell would be nonfunctional.
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