I was checking out some videos from the 90's and got some valuable info on leg drive. Watch the two videos and check out the leg drive down initially while the weight is back by both Ryan and Paul Ferency. Ryan's is a little more noticeable.
http://www.ryanvierrausa.com/documents/1995 Ringwood Austrailia games.wmv
http://www.ryanvierrausa.com/documents/Paul wob WR.wmv
Here is a direct link to the thread
http://www.nasgaweb.com/forums/forum/fo ... PN=1&TPN=1