Not only children who indulged in silly horse-play either. Caving-clubs such as mine used to play to some very dubious games on boozy party-nights, but I think some of these games originated in Services barrack-rooms; also the source of the very non-PC "rugby songs" sometimes "sung" lustily in such parties.
Now although those antics, all now in the past and recalled with wry amusement but not too fondly, did sometimes cause trips to the local Casualty Unit, they did not kill anyone.
Unlike…
A former work colleague once told me of a horrible death by horse-play at his first place of work. An apprentice was killed by a fellow trainee sticking a trigger-operated air line nozzle between his legs, not thinking of any possible danger. Despite the couple of layers of fabric, the blast ruptured his intestines.
''''''
As for bullets, one day someone came along to the club workshop with one of those one-foot-cube biscuit-tins – the ex-Woolworths types you'd keep your Primus picnic-stove in. It was full of assorted iron-oxide samples shaped like nuts, bolts and Unknown Parts. We tipped it onto a bench and started rummaging… Luckily one member of the time was a Police Inspector so knew how to send for proper disposal, the some dozen revolver rounds that emerged.
….
There were I believe quite a number of instances of children trapping themselves inside large fridges; but it could also happen in other situations involving adults, by accident rather than misadventure. Therefore I was impressed by the mechanical safety precautions built into a sound-proofed cabinet installed in the laboratory at work.
It was a steel shed about 2 X 2 X 2 metres internally, with insulated walls. Although commissioned from, designed and built by a cold-store manufacturer, we used it for testing unpleasantly loud sound sources, as its insulation gave enormous acoustic attenuation. Its doors though, were all to the cold-room designs.
Its two pairs of double doors with rubber seals all round, were only a few inches apart, and slightly off-set by widths. The outer door had a roller-catch operated by a lever – standard fitting, but also an internal push-handle. Trying to close the outer door would fail if the inner was still open: the offset would re-inforce the obstructing.
The inner door's roller latch was operable from the inside by a large, luminescent, push knob; and pushing that door open also un-latched the outer door and pushed that open – also helped by the offset closure. Even if you could not open these heavy doors enough to escape, the gap would give you air, and let you yell for help.
In practice we never worked alone on anything hazardous in the laboratory; and we never worked inside the box with the door closed. (I would also temporarily obstruct the open doors against closure).
The enclosure also contained a ceiling light and emergency telephone, I think to the Reception office.
All that simple but very effective safety built in to enclosures like cold-stores used in trade premises where there should be no naive children playing around….