Reverse Video Reference of walking

Here are the links to the videos, I wasnt able to upload them to blogger so I uploaded them to youtube


first clip  http://youtu.be/F2oQouvvVmk

second clip  http://youtu.be/rfYHNsFEA_o

third clip   http://youtu.be/9PfGNNzv94I

Fourth clip   http://youtu.be/jJgYjuLCf4g