Afternoon!
Back with another somewhat useless exploration. I have been leveling my warlock and I was in the octopus thing called Nespirah in Vashj'ir, and I saw the pearls went up in the air a bit. I went ahead and Demonic Leaped up there and found out that you actually get past the invisible walls. Like I said, this is somewhat useless, because there isn't much more you can explore down there, but I like these kind of explorations I just 'stumble' upon. I suppose you could jump up there if you get in trouble if you have too many mobs on you or you're on a PvP server. The mobs will evade and you are behind the invisible wall so players cannot cast at you. Here is a video.
-Teryaki