1. Jon Krakauer had climbed Seven hundred feet since he stepped of the glacier.
  2. ” The rime was plastered over the rock to a thickness of two or three feet, so I kept plugging.” Which gave him to confidence to climb the crumbly armour of frost feathers.
  3.  The frost feathers were five inches thick.
  4.  Jon Krakauer had to climb back down because he was scared and he started hyperventilating.