By exhaling.
You didn't ask about if this was normal.Even then, blowing air out of his nose with amount of force isn't normal.
The main takeaway from this image is that the world is a simulation and everything is a lie, and, sometimes the animations don't load. It's NOT a still of a strange stance in a strange dance.
What's the context of the "show" it was part of? It seemed like a more serious video showing off how exquisite the restaurant is. But then a cat runs into a door with a loud thud and it continues like nothing happened. Was the audio added in post for that upload because I could believe it was just missed by the editor if there was no audio in the video footage in the first place.