Realization

His subconscious mind is trying to tell him something and he is trying to decipher his own thoughts so that he could listen

Right now, even the floating dust is slow in his eyes. 

But while everything seems to be slowing down around him, did not mean he could move as fast as his mind

Time still moves like normal it is just that his perception become so fast at this moment that everything seems slow down like he is in a slow motion video

In this state of enhanced perception, he is trying to understand the identity of this old man and that young girl

It is impossible for such a person to remain unknown. With such strength and such demeanor, it doesn't seem like the old man is a reclusive expert.

So, he must be someone. 

Sooner or later, that old man and that young girl is something that he has to face. He looks at that old man and that young girl