I wonder if that's the same root as when Carcass are discussing Crepitating Bowel Erosion. I never got what that was, but it also didn't matter. Now I'm happy to think of it as crunching and rattling sounds during bowel erosion, sounding kind of like my shoulder.

Can any medically minded types elaborate on this? Is it evidence of ligament/cartiledge damage? Fluid pockets caused by the deformation? Anything dangerous or degenerative about it?