It's 2am and below zero.  The wind is ripping into my face.  My hands are frozen.  My legs are numb.  I'm exhausted.  I'm scared.  Each step is a struggle.  I have no balance.  I can't breathe.  And as the oxygen continues to deplete from my brain, my thoughts are slowly turning to mush.

The obvious question is, why would any sane person decide to hike Kilimanjaro?