Despite appearances, this is not actually a vertical deflection measure:
http://www.youtube.com/watch?v=PRCA8MvedIo
It is a filtered permeability measure being abused by a motorist, who is in turn, erm, abused.
@Oliver Schick started
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Despite appearances, this is not actually a vertical deflection measure:
http://www.youtube.com/watch?v=PRCA8MvedIo
It is a filtered permeability measure being abused by a motorist, who is in turn, erm, abused.