He had been practicing going this distance since 2005! Imagine you stepping out onto a long board in the water, taking a few steps and it sinking immediately. That is probably what would happen to most of us at first.
So yeah, chill for a moment and realize just what this dude can do.
Understand that the impressiveness isn’t that he’s ‘walking on water’, but practicing such a level of concentration that is so much more easily said than done. Before saying that it’s not impressive – you try doing it first.
This is a demonstration of persistence, a will to create something happen and then making it so. Fractal it out – see the bigger picture of what can be achieved when you apply your focus to it.