I've been looking at movement on and off for a while now. Doesn't get a resounding response here, but its something I'm interested in. I've worked with a tripod this time with the washing line (Thanks Blueroom) and looked at the relationship between the curtain and the shadows (Thanks Mikbee)
There are three rows and you "read" them from left to right to see the sweep of the curtain.
Hopefully someone follows what Im trying to do.
Thanks for looking