Hero, you do understand what a one arm chin is? Not a one hand chin where you grip your wrist with your other hand. These are one arm pullups:http://www.crossfit.com/cf-video/onearmpull.mpg
If you can do that, then we really need to get a video of it and put it online. And I don't mean to doubt you, that's just phenomenal if you are able to do that.
yes i can do those. i do not grip anything. one arm is behind my back, the other hand is doing a chinup. it took me forever to do them. i can only do about 3.
to be able to do these i did chinups with dumbells between my feet. i started with 10lbs and worked my way up to 60lb dumbell. when i got rid of the dumbell, i was so used to lifting that amount of weight, that one army chin up was do-able. i can do one arm chin ups, but not one arm pullups.
one arm chinups:
theyre not easy by any means, i do them very slowly, turn red in the face, and shake, but i can do em.