When you saw who it was, you were dumbfounded, because the ragged little boy in front of you was yourself!
The little boy passed directly through your body and ran back into the thick fog.
You touched your own body with your hand and found that there was no sensation at all, silently sighing that you were dreaming again; only this time, your self-awareness in the dream was particularly strong.
Since it's a dream, you decided to take the attitude of an observer and chased after your younger self. Soon, you caught up with your youthful steps and confirmed that you were about thirteen years old.
The thirteen-year-old you fell suddenly while running, and in terror, you ignored your skinned knee and hurriedly climbed towards a banyan tree with many branches ahead.
