I find this varies considerably from near-death experience to near-death experience. For example, having a wandering loonie break down the door of my game store to look for women was so funny the entire concussion and pools of blood thing was a minor footnote. Being sucked out into the Atlantic by an undertow was deeply irritating. Having a snowbank collapse on me was alarming because of the claustrophobia issue. The car wreck was over almost before I had time to realise what was happening.

Usenet article (2003)

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