Medical chest-related question?

There is really no way for anyone on Yahoo answers to tell what did cause your episode, but like the other answer I have seen, it was definitely not a pulled muscle. You may have pulled a muscle, yes, but there is nothing that could cause such a reaction from muscle strain. It may be from the unnecessary stress that was put on your body during your above average lift, which could have caused a release of adrenaline, but that would most likely be a one time deal. One can only speculate that you are having cardiac related issues, however there are several systems in your body which could cause such a reaction, including respiratory, endocrine, or nervous system responses. After your physician runs a full myriad of tests will he be able to find out what is causing your episodes. Good luck!!