“Firecracker” was released as a single under the name “Computer Game”. As such, on early US pressings of the album, “Computer Game ‘Theme from The Circus’” and “Firecracker” were combined as one track, while the firecracker sound effect at the end of the track was indexed by itself as “Firecracker”. This was corrected on later pressings. US pressings also featured a more American-friendly mixing (highlighting a punchier equalization and heavy use of reverb.)

UPDATE! Here is the official music video with the computer game introduction: