Actually it appears that the Rush/Prophet rear suspension design was modeled after this early 90's Mantis Pro Floater, who would have thought?
http://forums.mtbr.com/attachment.php?attachmentid=116533&stc=1
http://forums.mtbr.com/attachment.php?attachmentid=116537&stc=1
http://forums.mtbr.com/attachment.php?attachmentid=116533&stc=1
http://forums.mtbr.com/attachment.php?attachmentid=116537&stc=1