This is probably more helpful: http://www.youtube.com/watch?v=Nqg01Nk3SYI
and this: http://www.youtube.com/watch?v=h4uDPZGYWmE
and this: http://www.youtube.com/watch?v=Mm4KlxG1SEg&feature=relat...
bonus round: http://www.youtube.com/watch?v=ZJh-13maChY