Nightmares are just that, nightmares. Once again they are so vivid that I wake up having a panic attacks. It is just like it is happening now. Voices, smells, tastes and sites all just rushing up to smack you in the head. Panic attacks happen not only from nightmares but are brought on by stress.
Anger being the key emotion causes stress and stress causes anger.
It is a vicious circle. The real problem is each time a full circle is made the speed increases.