Question Who know what were they talking about it? akunin no joken

Can you discern what were they talking about it from their intonation
in the English context?
Don't use online google translator, I need a manual translation
But It seemed that boy is angry enormously to that guy
from his intonation.
How can you understand those part?
because I want to see English version

Strillian said:

But It seemed that boy is angry enormously to that guy from his intonation.

Click to expand...

And the fact that he's punching the other kid could be a clue too.

It's difficult to say without more context but my first impression is:

"Any one can write this sort of thing..." <- as if he's repeating a criticism that the other guy said to him
"Then try writing it yourself!" <- and then telling him to f-k off