The taxiway was used partly because the following aircraft for departure had already lined up on Rwy 29, plus - why go further than you need to (aircraft turn back was a left hand turn from upwind Rwy 29) when Twy A at Darwin may as well be a runway...
The aircraft landed in the vicinity of the intersection Rwy 36 and Twy A, so fairly comfortably made it back with the flap "assist".
The extension of flap in a 208 increases the camber and surface area of the wing quite rapidly and the effect of this seems to be such that an extra couple hundred metres of glide (depending on the tailwind being experienced at the time) can be achieved. No dive or "zoom" required! Ultimately though, once the configuration change has occurred and the aircraft's inertia succumbs to the drag, it will descend at a steeper angle than it did before. The idea is that by then you will have achieved the landing area that you were previously falling just short of.
Not something that works in your C172, but the Caravan is an extraordinary machine!