Which is an ideal intro to suggest looking at this with the volume on. http://www.youtube.com/watch?v=oTAFITUgQeI PS From: The UK drawing research network mailing list [mailto:[log in to unmask]] On Behalf Of derrick welsh Sent: 15 November 2010 15:28 To: [log in to unmask] Subject: A nice thing Hi You probably want to turn the sound off before clicking on this link http://www.youtube.com/watch?v=_dnKYa7DQl4 ddw