I rarely get them but when I do... it's like my body is in panic mode but my mind is not? And while it's happening, my "inside voice" is TALKING-IN-ALL-CAPS if that makes sense.
I just try to listen to slow music and relax. It's crazy too, because it feels like my pulse is going crazy but when I test it, it's normal. Seeing that reading helps, and slowly feels like everything syncs back up
Very rare for me, maybe once every 4-5 months and never figured out what starts it for me, had it for as long as I can remember
http://bnuiransder.tumblr.com/
So much
A R T