Veteran World of Warcraft players are well aware that patch 3.0.2 ("Echoes of Doom") brought the Achievements system to the game. One of them is "Going Down?" which requires you to survive a 65-yard fall. What it doesn't tell you is that any damage mitigation spells other than the pally bubble will negate the achievement, so you can do it over and over again and not get the award. For those who have reached Shatrath and have a flying mount (or joined the Scryers), it's fairly easy. Jumping into water doesn't work, either, by the way.
Step 1: Step 1: Go to Shatrath
Seems obvious, but you never know...
Step 2: Go to the Scyrer's Tier
Go to the Scryer's Tier above the Lower City vendors' tent city, and stand on the ledge closest to the vendors. You want to be close to the center of the ledge, where the decorative scrollwork thingy is. The idea is to land about where the "chalk outline" is on the tarp below you. The "chalk outline" does not appear in the game, you'll have to mentally insert it yourself.
Step 3: If It Af First You Don't Succeed...
Try, try again. You can try jumping off the ledge (hit "space" as you run to the edge), or hop on your flying mount, move out over the tarp and up about 1 yard, and /dismount. I got it on my first attempt doing it this way.
Assuming you haven't splattered yourself all over the pavement by now, congratulations!