From how I read it, OP was implying that this happens any time there's a possibility of a fight (which can seriously inhibit his life, which would qualify it as a panic attack). Reading it over, he never stated that it was every time there was a possibility, so i must have jumped to that conclusion.
I did not intend to give a definitive diagnoses; it is why I said he should see a therapist. If I am wrong, they will inform the person, but it is better to find out before doing something that can make it worse, which a high-intensity art or any MMA gym (which is what people outside of here might suggest) might do. I should have written "you think you're having a panic attack" not "tell him you're having a panic attack", but I definitely did not mean it to be definitive, just that he should see someone first.