The fall victim stepped onto a counterweighted lift (parallel ropes with a board suspended between) not designed for people in a grain elevator. The counterweight was off. He tried to stop with his hands on the ropes (tore off skin), landed upright. Fx feet, ankles/tib fib, thighs, acetabular-femoral joints, T spine, and drove C spine into base of skull. Tough guy, lived another day in ICU.
Blackdog, USA toyed with nitrous oxide for field analgesia back in the late Seventies/nineteen eighty. Simultaneously and coincidentally, there was a wave of campus nitrous parties where I was working, a couple of kids went out dorm windows when they leaned back on window screens.