Yes they are really nasty, If you haven't had one it is difficult to explain the terror that you feel for no good reason.

I get them from time to time and I feel like I am going to suffocate and die. I hate it. No amount of self reasoning can control my mind from thinking I am suffocating. I do the cold water thing and that sometimes works.

Anybody got any sure fire ways of controlling/focusing your mind when this happens?