An announcement booms over huge speakers welcoming the three schools to the outdoor movie. The voice asks that the students not leave litter behind and says that they should also stay out of the cornfield and the surrounding woods. When the announcements are finished, the voice says that the movie will be The Sound of Music. August is surprised when kids from other schools boo and throw things at the screen.
At this movie, the adult-to-student ratio isn't at all in August's favor. This means that kids will be more likely to get away with poor behavior like booing and throwing things, as there simply as many adults around to shut that behavior down.