Reminds me of a Top Gear episode where they 'raced' an RS4 against a mountain climber, one taking the road, the other climbing straight up. The climber beat the car up, then they challenged him again on the way down. The guy just ran off the mountain, fell down a bit, then opened his chute and glided (won that match, too).
I dunno, can't tell, but those packs look like they could be chutes. I actually wouldn't mind doing that, myself, but not without the necessary precautions.