This practice is one form of what Shinzen Young would call “Noting Gone.” (He uses gone as a noun here, a certain kind of sensation, rather than an adjective.) What you’re noting is the moment where a thing goes from being here in your awareness to being gone from it, and the feeling of that moment. It doesn’t matter what the thing is –- a fish, an LED light, a musical note, a shape formed by drooping power lines. It also doesn’t matter how it vanishes — by slipping beneath the surface, by turning off, by going silent, by exiting your field of vision. In all cases the this gone quality has the same feel. It is the unmistakable, mildly surreal sensation of a thing having vanished.~ David Cain from, https://www.raptitude.com/2022/06/the-vanishing-point/
This piece is a real splinter in my mind. I feel certain I’ve seen the “noting gone” concept before… but I can’t definitely find it. Perhaps I’m recalling that I read this very article, 6 months ago, AND marked it for reading later. So now I’m actually reading it a second time . . . It is definitely an unmistakable, mildly surreal sensation of a thing having vanished.
Also, in my quest to dig out the splinter, I searched for “gone” and got an interesting in itself set of posts.