A Supreme Athlete
Watch the video! You will be amazed! On a similar note, I am practicing the elbow lever (Mayura asana), and I thought perhaps after a few months of practice I could perform the single arm elbow lever. However, on the flipside, watch this man executing single arm elbow lever switching from left to right, dynamically. Not only this, you will also watch him perform many other movements, which I thought were impossible to perform by humans. For example, the single arm clap hand stand, the tumbling burpee, planche pushup, planche to hand stand, etc.
Watch him for inspiration. Or, on the other hand be ready to be disheartened, as it did to me. Nevertheless, he is a supreme athlete.