 Lucas acknowledges his debt to Akira Kurosawa (qv)s  _Kakushi toride no san akunin (1958)_ (qv) "Hidden Fortress" in the  first conference room scene on the Death Star. Just as an Imperial  Officer is saying the line "...the Rebels hidden fort..." he is  telekinetically strangled by Darth Vader, shutting him up before he  can say the full title.