  Everyone must have noticed how we swing our arms while walking. Left arm goes forward with the right leg and the right with the left leg.
HAve you ever wondered why we do this? I guess to maintain balance? Some people move them like throughout - shoulder to finger tips while some just move their hands, wrist onwards ! Its quite a characteristic how people walk .. very many individual styles. I find it wierd if I spot someone who's walking without moving his/her arms. Haha ... they _have_ to move their shoulders either way coz thats just natural for the way human beings walk. 
