Jump from Netherstorm to Hellfire Peninsula

I don't know why this is so fascinating, but it really is. Tulvar posted this on the forums-- it's him using the Rocket Boots Xtreme (and the Filled Festive Mug from New Year's Eve, which grants multi-use slowfall) to fly from the top of Netherstorm all the way across the abyss to the tip of Hellfire Peninsula. And he survives, which is what surprised me most of all-- I would have thought that a fall like that would kill a man (err, a troll), but I guess he nabbed a Mug just in time.

Xtreme sports, Outland style. Which makes me wonder: what's the highest point in Azeroth and Outland? Surely it's Blackrock Mountain, right? The top of Ironforge Mountain? Or Mount Hyjal? If it didn't exist officially only the Caverns of Time at this point, that is. And surely Molten Core is the lowest point in the land, but what's the lowest non-instanced point? Un'goro?

[Thanks, Jacckk!]