This week Chris and Jonny faced up to the daunting prospect of climbing a wall of ice.
The pair headed over to Vertical Chill in London's Covent Garden, where their 'mountain' guide for the day was leading British climber Tim Emmett - who currently holds the title for doing the Hardest Ice Climb in the World.
Click Play above to watch the video and see who was able to look down on his rival, and whose chances of glory slipped away.
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