Possible Clues:

• Descend by rope
• Descend on ropes
• Rappel, in British parlance
• Come down the mountain with braking system and tell the tale in retrospect
• Descend a mountain using ropes
• Use a rope to climb down a mountain
• Descend on a rope
• Climb down using a rope
• Fall ill, catching bovine disease, and plummet
• Is able to move and descend spectacularly