Spine wrangling ∞
Fun fact: the spine is tough and strong and difficult to stabilize without surgically installing screws and rods, and even then it’s tricky: spinal fixations occasionally fall apart (my wife’s did). In fact, it’s so hard to control spinal movement that the value of external bracing in spinal fracture rehab remains controversial. Worse, one fascinating experiment (Rohlmann et al) showed that bracing may actually cause some, dysfunctional spinal function — resulting in less support, rather than more!