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and Peter you mentionedPacking can cause a blackout under certain circumstances.
Could you folks say more about this. When is the blackout likely to occur and for what reasons? How is this different from SWB? Are there warning signs? Is it more likely to happen for beginners or when one has developed greater capacity, or is a risk factor across the board? How much of a risk factor is it? Have either of you experienced this personally or witnessed it in others? If so what was it like? If a person blackouts from packing what first aid steps are necessary? Thanks, Angus.....just the occasional blackout due to reduced cardiac output.