Bruno Loff:
My experience is that the great majority of "feels like something (big) is about to happen" are just that (feels like) and nothing more.
In MCTB Daniel actually uses the phrase "the feeling that something big is about to happen" as indicative of the early stages of A&P.
I'm now fairly certain that I crossed the A&P. I failed to mention in my original post that I felt like I was levitating, which I just found in Progress of Insight: "he feels as if the whole body had risen up and remained in the air without touching the ground".
Then, a couple nights ago when I experienced a few moments of a thin flailing stream of white light across my field of vision, which was followed the next day by fear and feelings of dissolution (aka Dark Night). Reality was pretty overwhelming for a little while, but then, after some practice, I feel like I settled into Equanimity.
Another reason I'm pretty certain this is where I am is that I can relate to everything in Daniel's book up to this point, but everything from Fruition on sounds like gobbledygook to me (and, likewise, prior to getting to this point, everything in A&P and Dark Night sounded like gobbledygook).
If this was, in fact, A&P, I'm disappointed that it wasn't more spectacular, but oh well, maybe next time.
[I should add that I know it doesn't really matter whether I'm at this stage or not--that the point is to continue meditating. Heck, there are aspects of the "Mind and Body" stage I didn't particularly relate to, and if further meditation brings me to that point, making me realize I was an idiot for thinking I was in Equanimity, then so be it. Either way, I will be progressing.]