Well this is all pretty odd I think. I have received emails from others who have also just recently started having this symptom. You don't suppose we're subjects of some covert experiment or maybe a terrorist attack do you? ':) Someone just wrote me suggesting it might be a migrating parasite, anyone else ever consider that? Sounds weird but I won't discredit anything. I've learned some pretty strange things about health and related issues over the last few years, anything's possible. My X-ray, by the way, came back clear, as I knew it would. The fluttering (no not a blub blub blub, more like a flippy flippy flip flip, really fast) seems to subside when I increase my water intake and even moreso when I take my vitamin C powder.