In 1977 I walked into the theater with my popcorn  the split second the introduction text disappeared.  There was already  a raging battle in progress.  What the hell is going on? What is that robot? Who is that guy in black? I couldn't tell the good guys from the bad guys.   Everybody knows everybody already. Who's that fat girl? What the hell is a Rebel Alliance.  I felt like I must have missed a good 30 minutes of the movie to be so far behind. The movie just seemed to go on forever. But I had to admit  it was thrilling.   I had to see it a second time to  realize i had missed about one minute.