Genuinely global, multicultural, and multilingual in its urban perspectives, this lively documentary features graffiti artists talking about their work and illustrates their discourse with images shot in Philadelphia, New York, Los Angeles, Berlin, Hamburg, Amsterdam, Paris, Barcelona, Cape Town, Sao Paolo, Tijuana, and Tokyo. Filmmaker Jon Reiss also occasionally gives voice to people trying to eradicate graffiti. The relentless quick cutting and pop soundtrack are counterbalanced by the artists’ personalities and sociopolitical credos. Unlike Michael Glawogger’s more visionary Megacities (1998), this offers neither city symphonies nor overarching theses, but as the title suggests, the theme of rebellion predominates. Subtitled. 93 min. (JR)