How do they do this? HUGE plants!

http://www.youtube.com/watch?v=hs6yHR1Ac_E


Please look at this video and help me out. In the video between 1:00 and 1:15 it shows the base of the plant where the stem comes out of the medium. How do they get so many main, thick stems like that? i couldn't believe the amount of bud from only two plants. Please help because, if possibly, i would like to do the same.

I've seen bigger. But those are nice!

Some strains bush out more than others. They've done some heavy trimming on the lower sections.

alright thanks. i've heard of "topping" the plants, where you trim the top and it grows back as two. Is that true? if so, do you think they did that?