Warning. If you have had panic attacks before, some of the imagery here may trigger you. If you start to feel what I call "the whitewater," stop reading, remind yourself there are no bears, and count out 10 slow steady breaths. We can learn to make panic attacks our friends even though they totally suck. Hopefully this article will help.
If you are reading because someone you love has panic attacks, hopefully the imagery will give you a hint of what it is like. Take that hint and multiply it by a thousand. It can feel that bad; but that's not the end of the story.