there are plenty of videos (in many languages) scattered around the internet in this subject
lets compile them here
heres 1
http://lockerroomshowers.tumblr.com/post/121462064888/whoa-3-0-the-video
lets compile them here
heres 1
http://lockerroomshowers.tumblr.com/post/121462064888/whoa-3-0-the-video