Re-observation is all fluff and no substance ... Bodily sensations of creepy revulsion, disgust, or profound existential angst may arise, and yet, those with wisdom will notice they are like confetti, like sparkles of light, like raindrops, albeit seemingly acid raindrops. Still, they are not harmful. 

... Do not try to power through this: that’s first vipassana jhana. Do not try to go for really tight, narrow, fine, tingly frequencies that are all about a center of attention and not about background: that is second vipassana jhana. Re-observation comes at the peak of the third vipassana jhana: it is broad, rich, chaotic, and about the “background” and issues of synchrony and asychrony. “Background” here means those things we typically think of as on “this side”, as well as those sensations that tend to frame objects in the center of attention, as well as just those sensations that are more in the direction of “us”.

... The frequencies of pulses are chaotic and fast. We are getting into more sophisticated forms of more inclusive attention that are starting to broaden enough to include many diverse, irregular, erratic, intricate aspects of reality. Go for that attention-wise, meaning go into frequencies of the oscillation of the sensations that appear to be subject and object that are really fast and harmonically irritating, instead of regular and predictable. We are talking at least 10 to 18 pulses of sensations per second, if not a lot more. While noting can help if we are getting run over in this stage, if we can get it together to go into the broad vibrational complexity directly, we can learn to draw on the remarkable discerning power of our minds. We can notice how fast reality is arising, and, as reality and comprehension are the same thing in their essence, we can notice that comprehension, and thus contemplation, can go this fast. It takes an elegant letting go of control and an embracing of that to get what Re-observation is trying to teach you.