Artistry, precision, and strength

First watch: http://vitaminl.tv/video/1028

If you look carefully, even the tough details are synchronized: heads change focus in harmony, legs are extended at the same angle, handstands are held for the exact same amount of time.  Just think about how difficult this routine would be for one person to execute, then multiply that six.  Their spacing completely blows me away; all those tumble-runs and floor rolls, and they still end up in a textbook perfect formation.  Their precision is not only aesthetic: one hair out of place would mean serious injury, especially in the section where they flip and somersault over and under one another.

I wonder how many times you have to do something wrong in that kind of routine before it becomes perfect and clean.  The time and effort they must have put into conditioning, practice, and more practice is staggering.  As someone who's terrified of tumbling (I can't even do a cartwheel...too scared of falling), this routine is incomprehensible and beautiful.  To me, it looks like they defy gravity and just fly through the air: if dancing has taught me anything, though, it's that nothing is effortless.  These dancers (and gymnasts!) have a formidable strength reserve and still maintain their artistry.  I wonder if they compete in gymnastics, too?  One of them landed perfectly in a huge tumble run: this means big points in competitions!