primary muscles

[keasbey]

http://youtube.com/watch?v=_VzEFANAMbw&feature=related

any of you guys able to do this.. i havent tried it but would like to be able to and was just curious as to which major muscle would need to be top notch..

core and shoulders?

 

[enigma4dub]

what you said pus some serious rotator strength

 

[ajaygill]

one day lol