I've heard of people getting this achievement on accident. However, for those that don't have that sort of luck:
It might take a few tries, but this technique worked well for me. Leave the gap on the bottom left, and leave proper space on the right so you can toss your green pieces to build up your pre-cascade. When you get to a height of four green pieces, long-piece attack it (the line clear piece last) and watch it fly. All of it is shown in the video.
Video credit goes to RDubes.