I need an idea....

From experience if you have a panic attack and you need to settle down take a breath in worth 1-2seconds of air(to 100% lung capacity), and let a breath out 7-10seconds.
It will slow your heart rate and you can easily settle down.
*SNIFF, then act like your letting out a hit really really slow*

Don't feel stupid doing this exercise...

heres some more help
http://www.ehow.com/how_5663096_slow-down-heart-rate-naturally.html
http://wiki.answers.com/Q/How_to_slow_heart_rate

It wasn't a panic attack. I could control my heart rate and breathing. My muscles were shaking. It wasnt a goddamn optical illusion or something like some of you think