A few animations showing the Whip Finish from my bookmarks.
http://www.troutflies.com/tutorials/whip_finish/
http://www.youtube.com/watch?v=wFDjS-UuJVA
http://www.sexyloops.com/flytying/whipfinishag.shtml
http://home.swipnet.se/~w-71486/whippeneng.htm ( this one is a step by step )
http://www.tie1on.net/whipanim.htm