If you have been unfortunate enough to have endured this kind of experience, and it satisfies the rule, then you can't go wrong in deciding to apply TNT to neutralize the feelings. The death of a loved one or family member is a good example. Depression is a common reaction to most bad things that happen to us. View it here as the main response to an experience. Sexual abuse and the examples provided as causing anger also apply for depression.
Panic attacks are unique.
I found that the source of panic attacks was always difficult to identify. They resemble a build-up of pressure from some active experience that explodes, without warning, into the symptoms we refer to as panic attacks. They are like the hole in the roof which is in one place, and the leak is in another. You can patch all the holes until the leak stops, or patch one hole and hope the leak stops. Like everything else, panic attacks are caused by some experience that was traumatic.