Its -25C, & you have just skied non-stop for 16 hours pulling a heavy sledge. You have only had a litre of water to drink. Fog is obscuring your visibility as you travel over a thin layer of drifting sea ice floating on an ocean 2 miles deep. It's tough.
You are tired, hungry, de-hydrated, very cold & slightly disorientated.
It's now that you find out what sort of person you really are, and how dearly you want to reach your goal.
Do you have the drive to dig deep and overcome the challenges to succeed.....