For a long time, I relished the way I could "crack" my back and neck. Just the right turn of my torso would send a ripple of clicks and releases along my spine. My idea about it was that those cracks were "unsticking" the gears of my body-machine. But there was also an underlying pattern playing itself out. Those cracks were a symbol of sorts, they represented all the breakthroughs and "tapas" I had accomplished through my many years of diligent practice. The cracks felt good, at least until they didn't anymore.