Difference

that's what you'll be doing:
http://youtube.com/watch?v=hhPmrpxGLqc

and that's what I'll be doing:
http://youtube.com/watch?v=bXhQNRsH3uc

or this one, it's wilder :)
http://youtube.com/watch?v=5E4mBoGX6Dw

Nice difference :)