Sorry, I get it. Ok, before the AO Chiro, my neck was very stiff and hardly moved at all. It made not a lot of sound because it was all one unit. AFTER the initial visit and for the first month, then I heard all sorts of clicking, grinding and popping when I laid down or just moved my head funny. My neck was starting to loosen up and all the bones were able to start moving again. All my muscles were hypertonic (stiff) so it took a long time (think regular visits over weeks and months) and some exercises to get everything to accept the new, correct positioning of the bones. The CSF thing was a hot, pulsing, whooshing sort of an affair. It would happen in the first few minutes after the adjustment. That only happened a couple of times, but it made me dizzy for a while (minutes).
Grinding is your bones moving about. Mine were locked into place and then took a while to find and hold a more natural, correct position. I’ve had 4 major car wrecks and a lot of arthritis. Still, four months later, I can’t say I regret the treatment. I go in once or twice a month now for adjustment.