Why do I sometimes get a large 'crack' or 'pop' from the center of my breast bone when I stretch my arms out wide and arch my back? - Quora
Why do I sometimes get a large 'crack' or 'pop' from the center of my breast bone when I stretch my arms out wide and arch my back? - Quora
![DAE crack their sternum, the bone in the center of your chest that connects the two sides of your ribcage : r/DoesAnybodyElse DAE crack their sternum, the bone in the center of your chest that connects the two sides of your ribcage : r/DoesAnybodyElse](http://www.heart-valve-surgery.com/Images/sternum-click.jpg)