I guess I'm using the word shadows incorrectly. I meant that I start trying to bust at the first sign of a CH. Amholla, I find that waiting just a minute too long will lead to a full-blown attack. I typically get mild symptoms for about five minutes before it ramps up to full tilt. Trying to bust instead of waiting and hoping it won't ramp up to an extreme, which rarely happens. I've read comments from others here, saying that they might have to try to bust a number of times in one day, but eventually the extreme CH happens. That's often my experience. Yesterday I had one mild, busted it with ACV in less than five minutes (ACV swish five times, chased with cold water), but an hour later I had to do it again, this time it went to moderate level, but not to full tilt. I was expecting it to come again, maybe in the middle of the night. (Mine typically happen between 3-5pm, but if I skip a day, it might happen overnight, hard to predict when the next one will be, though they're often 24 later.) But this time I didn't get one overnight.