That sound you just heard is every orthopedic surgeon wincing simultaneously. When the spine takes a direct axial load impact like that — full body weight coming down onto a narrow surface at speed — the forces transmitted through the vertebral column are catastrophic. The thoracic and lumbar vertebrae are not designed to absorb that kind of concentrated compression. What you're looking at in real time is a mechanism of injury capable of producing vertebral fractures, herniated discs, spinal cor