„Es gibt keine Tyranneien, die nicht versuchen, die Kunst einzuschränken, weil sie die Macht der Kunst sehen. Kunst kann der Welt Dinge sagen, die sonst nicht geteilt werden können. Kunst vermittelt Gefühle.“
- Volodymyr Selenskyj, Präsident der Ukraine
Theoretical Video (1998 – 1999) is an installation comprising a long sequence of photographs mounted in a horizontal band along the wall, presented as if they are the individual frames of a video film. The images are selected from video footage Marshall shot in Chicago's South Side from the window of his home.
They create a fragmented, experimental narrative focusing predominantly on Chicago's annual Bud Billiken Parade, including, in large part, the scene of beauty queens in parade, along with marching bands and clowns, bringing a surreal, carnivalesque, feeling to an otherwise underprivileged neighbourhood.