When you hear "no one knows how they did it", don't believe it. This guy shows you can use simple techniques and only a few people to move huge weights.
[ame="https://www.youtube.com/watch?v=CdOALH67eqM"]https://www.youtube.com/watch?v=CdOALH67eqM[/ame]
[ame="https://www.youtube.com/watch?v=CdOALH67eqM"]https://www.youtube.com/watch?v=CdOALH67eqM[/ame]