I'm doubtful if i am the only person experiencing this. but it is so embarassing when my bones crack loudly in front of many people especially when my movment was minimal.
Whenever i'm doing my assignments i do it side lying, and for a long time in that position, when i stretch my chest pops!
I am an athlete, so im used to training. but during stretching like trunk and head rotation my spine cracks loudly like firecrackers popping consecutively!
And when im tired i use to go to a massage parlor to relax. when its time to push myback, never time that my back didnt popped. and even at the lumbar region! i dont know if its my sacrum or coccyx. but in a way its relaxing but whenever im tired i am forced to crack everything on me that is used to be cracked!

i dont know how it affects me, but somehow its stress relieving...