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So, if you were hung upside down from a crane, how far from the ground could you get
before your hair would no longer touch the floor?
See fig 1 for a pictorial representation of the aforementioned question.
Fig1: http://img23.imageshack.us/my.php?image=upsidedownwx6.jpg
I reckon around 2.5 inches for me.
Please play.