Nathan Davies, Head of Policy at Rospa, the Royal Society for the Prevention of Accidents, said depriving their brain of oxygen could make people pass out, cause cardiac arrest or brain damage, killing in just a few short seconds.
A 'BLACKOUT Challenge' which children at a York school have taken part in can kill in seconds, a safety boss has warned.
Nathan Davies, Head of Policy at Rospa, the Royal Society for the Prevention of Accidents, said depriving their brain of oxygen could make people pass out, cause cardiac arrest or brain damage, killing in just a few short seconds.
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