> Yes, I had a high speed head-on collision, when aged 17. I
> didn't hit my head but I was amnesic for a second or two. I
> walked away but with impressive seatbelt bruises over the
> next few days. I figure, with both vehicles doing around
> 60mph, the "closing speed" was 120mph, which is equivalent to
> a "brick wall" impact of 60mph. The g-forces must have been
> considerable, 60 to 0 in less than a second. That's probably
> around 4 or 5G I think (any mathematicians out there?).
Nobody else has raised this which probably means I'm wrong; but I think 60
mph is about 100 kph or 28 metres per second. Stopping in 1 second is
therefore under 3G. (OK, less than a second could mean anything and you'll
probably have had higher peak deceleration). The joys of pedantry.
I've seen rugby players genuinely lose consciousness briefly then get up and
be OK- how many of these patients never make it to hospital we don't know.
Matt Dunn
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