Continuity mistake: The girl dressed in a pastel pink and gold dress, the one that Benvolio likes, is behind him talking in the shot that he's looking out into the dance floor. But in the next shot, the girl comes out from another area, then again in the shot after that, behind Benvolio. (00:23:26)
Juliet: Good night, good night. Parting is such sweet sorrow, That I shall say good night till it be morrow.