Movies sell fantasy and fantasy is exactly what you describe. “Bending” a person over a knee through the spine hyperextends the spine. This causes facet fractures and tears of the anterior disc. This injury typically will not cause a disc herniation.
Let us suspend judgment and assume however that the disc is herniated through this maneuver. A disc tear is required to allow a herniation to occur. This disc tear never heals because the disc is avascular (no blood supply). You cannot reduce a disc herniation back to the center of the disc as the mechanics do not allow this to happen.
Without surgery, a typical disc herniation takes between eight weeks to four months for an individual to recover. Ah- if fantasy could only be reality.
Donald Corenman, MD, DC is a highly-regarded spine surgeon, considered an expert in the area of neck and back pain. Trained as both a Medical Doctor and Doctor of Chiropractic, Dr. Corenman earned academic appointments as Clinical Assistant Professor and Assistant Professor of Orthopaedic Surgery at the University of Colorado Health Sciences Center, and his research on spine surgery and rehabilitation has resulted in the publication of multiple peer-reviewed articles and two books.