Well I just posted how to get the achievement without taking any damage and make it a sure thing, and I think this goes with it.
If you cancel the buff that the Jump-a-Tron 4000 gives you from the Bring me the Eggs! quest you'll be able to fall without dying. Probably just for 3 minutes... but I just ran and fell of the bridge to the left of it and didn't take any damage on my druid at all. Long fall. I actually turned to my girlfriend and said... "oh shit I'm dead" and survived.
Nifty.