Chiropractic or spinal adjustment is the process of manipulating the spine by a licensed chiropractor to correct misalignment and help reduce pain. In addition to a reliance on gentle stretching and massage techniques, many therapists prefer to utilize chiropractic drop tables to realign joints. When manual manipulation is the preferred course of action, a chiropractor typically applies controlled and quick force with his or her hands. This process is often accompanied by joint cavitation (cracking), which is an audible release of gas followed by a feeling of relief, although short-term minor discomfort is not uncommon.