Yes, a lot of this does make sense! The chest pain was only (so far) on that one day. I do also have the VG, (red bull) but have not really used it too much, the vapor is just strange, and the taste, well, it is just weird. Not sure if this is how VG's are, or maybe that particular flavor I got? What is funny, is that my BF is Chinese, and he is worried about me vaping, talking down about how some companies in China will put anything in, even it means killing people to save money. (remember all those news stories...) He (and is a Nurse) says I should be careful, as this product is still too new. I agree, but I tell him "Uhh, would you rather have me go back to smoking cigs?" I really hope some more positive news comes out in light of the e-cig.