My own fault. The equipment had safeties but your primary piece of protective equipment was your brain. There was a presumption that anyone entering this room was intelligent enough to keep away from hot things, sharp things, and things carrying large stores of momentum.

Casting a curious gaze down on planet Earth, extra-terrestrial beings could well be forgiven for assuming that we humans are programmed in every move we make, by a palm-sized, oblong, slab of glass. More perplexing than that, who on earth could convince them otherwise ?