This happened to me in 1983 for the showing of ROTJ.
I blew off high school with a friend and waited outside all morning. We were in line for the second showing, when the crowd from the first came out PISSED.
The Dolby sound system crapped out and they ended the movie after an hour.
All that for ewoks ...
I went to the original Star Wars in 1977 the first couple days it was out at a local Mall Cinema. The movie started with the text scrolling down, “Long ago in a ...” The film broke and we sat there about 20 minutes. Finally the movie started again and there were the big mechanical camel things in a desert. So what did we miss?? I never did learn.
Watched the movie. Meh. Was convinced that wise man who died in the beginning was not really dead. He kept talking to Luke all through the movie. End of movie. He’s still dead.
Never watched another Star Wars movie...