This is a fun position to explore, and the sudden head movement requires me to really lock in to the sensation of weight shifting in the hands.
The specific sequence is handstand to small straddle — close the legs to a straight handstand and look up to the feet — open the legs back to small straddle and move the head to look back down — 3 repetitions and hold the last look-through.
The head shift precipitates a body shift, and for me, in order to maintain the handstand, I really have to calibrate hands, shoulders, midline and legs.
I also really love the feel of locking the chin into the chest and pushing up the shoulders!
From a conventional hand-balancing perspective, my faults (among others) include arching when I move to the small straddle and letting my knees soften.
Jason owns and directs Portland Ashtanga Yoga.