Continuity mistake: In Short Circuit (1986), Benjamin's last name is Jabituya. In this film, it seems to have become Jahrvi.
Continuity mistake: When Johnny is cleaning the window to see outside, the shape made on the window is different during the inside shots than it is on the outside shots.
Answer: They could only communicate via musical tones. They were trying to give Sandy clues as to where they were being held (playing 'Downtown' to let her know they were downtown). 'Help Me Rhonda' was a clue that they were in trouble.
Brian Katcher