 A lot of the songs are surreal and many feature nonsense lyrics (for example "Surfin Frog").The albums "Monsters in Love" and "La mécanique du cœur" are set in a surreal world full of whimsical monsters and other fantastic characters which Mathias Malzieu has used as a setting for two original comic books.Joann Sfar illustrated the cover art for the comic books as well as the two albums.