In the recent newsletter:
"I do neck bridges as a part of my stretching and whenever my neck tenses up from overdoing some exercises, such as headsprings. Back neck bridges with face on the mat, and front neck bridges with chin touching the chest, relax my neck nicely."
Dude... that's insane. I know what a handspring is to a handstand, now with a headstand, the head along with the arms is used. Is this what you mean, or are you seriously springing off the ground front or backwards using only your head?
I think the only place I saw that was on Shaolin Soccer?
HEADsprings?
thats a true technique in shaolin martial arts. its called a steel or iron head flip in chinese. look it up on youtube. lots of people can do it. not that hard. mostly in the momentum of the legs and proper use of the abdominals. its similar to a kip-up in that respect. do it with your hands until you can get it going fast and strong enough. then keep your hands out to the side and go for it. eventually, you can do it and then hold your hands behind your back.