I don't get an anxiety attack, but in the minutes from the gate to starting the apu/engines I'm ACUTELY aware that there's no air getting in, or the only air getting in is warm. Bothers the hell out of me.

I had a panic attack once in my life and now that I know what it was (or I think I do) I would probably deal with it better if it ever happened again, but I know exactly why it happened and I dealt with it...though I dealt with it in a manner you couldn't on a plane which is why I won't bother with details haha