This short silly clip sums up the best way to do the achievement: Gonna Go When the Volcano Blows.
If you haven't seen the easy way to do this achievement, well, you're in for a surprise.
If you have, I hope you still get a chuckle out of the movie anyways. Maybe this will get Blizzard's attention that it's a silly achievement as it stands now!
Wrath guides, movies, and strats (the non-silly kinds) at: