We can't measure any of that.
We don't know where your eyes are. We have no access to your pupil dilation, your heart rate, your childhood pets, or your feelings about your mother. The "deep-tissue attention scan" was a progress bar and a typewriter effect. The classification was a word we picked before you loaded the page.
But for some number of seconds, you gave this page your full, undivided, absolutely free attention — because it told you to sit still, and it used a green monospace font, and it had a progress bar, and progress bars are basically hypnosis for anyone who's ever watched a file download.
That's centripetal technology. The page said LOOK AT ME and you looked.
The word for what just happened is frame. You were inside one. A clinical frame — the aesthetic of measurement, the language of assessment, the implied authority of a system that claims to see you. You couldn't click away because the page was performing certainty about you, and certainty about you is the most addictive substance in the known universe.
Now you're outside the frame. That slight loosening you feel — the half-laugh, the "oh, you bastards" — that's frame-awareness. Once you can feel it, it doesn't go away. That's the permanent residue. Congratulations or condolences, depending on how much you enjoyed not knowing.
A shellac record held three minutes per side. That's a physical constraint — the groove can only spiral so far before it runs out of vinyl. Three generations internalized that constraint as the "natural" length of a song. The LP freed them and they kept making three-minute songs anyway, because the frame had become invisible.
You just watched your own frame become visible in real time. That's the whole trick. There isn't another one.
The joke is the teaching. The laugh is the body confirming it got the joke.