you can mark me off as another case of this. I tried to explain in a lot of ways to myself; too many push-ups, too much caffeine, too much potsmoking. I had a coffee then 2 -12 oz cokes later. my heart was beating real fast plus I was worried that it might be something serious, so that made me freak out a little then I looked in the mirror and my face was pale . I realized at the very least I needed to chill out. So I sat and breathed deeply and normally and took my mind off it and I went back to normal. I happen to have heart disease in my fam so I was trippin'. I saw a doc 2 months ago; he didn't see anything serious