Yesterday during the warmup before fight class, I felt or heard my left knee snap or pop. It was so quick & unexpected & alarming that I couldn't say, even a moment later, what had happened or what sense was involved.
I was afraid but a moment later, when I dared wiggle it, it felt fine.
In fact, it felt better than it has in years.
Today it's still fine & I could get into a deeper stance than I have in ages.
I wonder if I managed to break an adhesion or scar tissue. In any event, I am pretty happy not to have pain in my knee for the first time in recent memory.