I had a hard time wrapping my head around Jon Reiss's history of graffiti documentary Bomb It!, until I realized that the film -- like the graffiti artists it presents -- doesn't really give a good goddamn how I feel about graffiti. This exists, Bomb It! says, and here it is, and here's where it's going; it's a brisk and bracing portrait of the state of the art. Of course, the fact that the art is often a crime comes up, starting with an opening scene captured with night-vision cameras where a group of "bombers" craft a work with swift strokes of their spray cans before fleeing into the night. ...

Director Reiss has a past in unconventional art (art so unconventional, in fact, the question of it's really art comes into play) -- he spent years filming the merry roboticists of San Francisco's Survival Research Laboratories, and captured the rave scene in his doc Better Living Through Circuitry -- and his movie travels the globe, looking at what's on walls and who put it there and why. We get a history of the form -- starting with Daryl "Cornbread" McCray, the graffiti artist who first plastered his name all over Philly in 1967: "The more they talked, the more I wrote, the more they talked the more I wrote ..." Like graffiti, the movie leaps from Philly to New York, and then it goes everywhere -- Amsterdam, London, Capetown, Barcelona, Hamburg, Paris and more.

And Reiss boldly incorporates a 'more is more' visual strategy into his film, and he makes it work. We see Cornbread's youthful exploits in animation; archival news footage is cut into first-person reminisces; as Parisian graffiti artist Blek the Rat explains his motifs and themes (and while it seems initially odd to think about a graffiti artist having motifs and themes, Bomb It! makes it clear, fast, that it really isn't) his stenciled rat paintings take on skittering life and scramble through the landscape. As one graffiti artist talks about the line between typography and expression ("You don't want to lose the letters, but you want to lose the letters ...") a tag on a wall is dissected letter by letter as an exploded diagram through computer-generated effects.

Reiss interviews graffiti practitioners, but he also interviews their foes, from Lt. Steve Mora of the NYPD Vandal Squad to L.A. 'graffiti guerrilla' Joe Connolly. The timeless question of graffiti -- is it a shout of self-assertion, reclaiming public spaces clutched in consumer capitalism's greedy hands, or a childish act of petty crime with a costly clean-up bill? -- is examined in Bomb It!, but the film's also smart enough to know that question can't possibly be answered in a 90-minute film. Bomb It! also interestingly examines what happens when a 40-year tradition of guerrilla activity becomes a mainstream commodity; two Spanish bombers talk about their independent, artistic work, which we see - along with the shoe they designed for Nike. Shepard Fairey explains how his infamous Andre the Giant-themed 'Obey' paintings were initiated as a blow against mass culture -- and then took on a mass-culture life of their own. And we see how some graffiti artists went from subway cars to gallery walls, as other bombers fiercely maintain "Graffiti on canvas? That's the end of graffiti."

L.A. graffiti legend Robbie Conal at one point offers that L.A. is "deeply superficial," and that contradiction runs through Bomb It!, too. Graffiti can be art, but it's also a crime; graffiti is a crime, but some of it is beautiful. At one point, a member of a group of Parisian graffiti artists paraphrases a better-known French philosopher and offers "I tag, therefore I am." Bomb It! is a fresh, fierce look at the history and theory of a phenomenon that, at first glance, seems to not have either; it didn't make up my mind on how I felt about graffiti, but it conveyed the excitement and energy and contradictions of it while providing plenty to think about.