Yesterday while brushing my teeth i was doing some plie' squats (did i spell that right?). and on the decent, i could hear a crunching sound in my right knee. i couldnt really feel anything but i definitely heard it. what could be rubbing together in the knee to cause this crunching sound? i dont really have pain in the knee but i do feel weak in the knee area in general on both sides. somehow, crunching sounds just dont seem right LOL any insight would be appreciated!