over work on _THX  1138 (1970)_ for George Lucas (qv), he made a blunder and  exclaimed, "I think I ran over a wookiee back there."  George Lucas (qv), confused, asked what he meant by the term.  Terry McGovern (qv) admitted that he didnt know and added that he  simply made it up. George Lucas (qv) never forgot the cute word  and used it years later in Star Wars.