As I remember, the automobile driving manual says the average driver's reaction time is: .75 seconds -or- 1 car length for every 10 mph...

Test your reaction time with this special test.

Click
http://www.bbc.co.uk/science/humanbody/sleep/sheep/reaction_version5.swf

This may drive you crazy for a while,but it's fun to test your reaction time.
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Whoever undertakes to set himself up as a judge of
Truth and Knowledge is shipwrecked by the laughter
of the gods.

-- Albert Einstein