Ours plays 'Oranges and Lemons', but it's so fast and jangly that it took me a while to work it out. Most of the vans around where I live tend to play 'Just One Cornetto'
Oh, that was always the standard for Game Maker to differentiate between sprites and objects, which typically had similar names. It's a difficult thing to unlearn!
It's an odd one. At a guess, the idea is that the build is so good / powerful that it breaks the game (or, indeed, the meta) for everyone else.