Two athletes stand next to each other on wooden platforms waiting for the signal to begin the race.
They have a good reason if they seem somewhat nervous -- they are at the start of a 1300 meter "race" down the side of a mountain-cliff.
The competition is the World BASE Race, and the title that these athletes compete for is 'The World's Fastest Flying Human Being'.
Competitors race each other to the bottom of the cliff, across the "finish line" using only a wingsuit, gravity and once across the finish line deploy their parachutes to land safely. A mistake in this race has consequences that are far more severe than a sprained ankle.