Best movie line delivered by an faceless character either off-screen or from a group or crowd?

I've always loved in "Forrest Gump" when Forrest is running and finally decides to stop in Utah and says he's tired and wants to go home, you hear someone from the running group behind go, "Now what are we supposed to do?". What are some other examples of lines in movies delivered by a "faceless" character?

If you can link the scene, even better.