Several elevated trains can be seen rolling by the background in exterior shots. This was no accident, as a production assistant stood near the tracks with a walkie-talkie and would tell Avildsen when trains were coming so he could shout “action.” 
Several elevated trains can be seen rolling by the background in exterior shots. This was no accident, as a production assistant stood near the tracks with a walkie-talkie and would tell Avildsen when trains were coming so he could shout “action.”