According to estimates from Rentrak this afternoon, Alan Ball's "Towelhead" led indieWIRE Box Office Tracking (iW BOT) - which ranks the per theater average of all reporting specialty films. The Warner Independent Films released grossed $53,000 on 4 screens for a $13,250 average. Oscilloscope's doc "Flow" also opened well. The Irena Salina directed film grossed $18,050 on 2 screens for a $9,045 average. And though its wide release makes it ineligible for iW BOT, Joel and Ethan Coen's "Burn After Reading" open at the top of the overall box office chart with a rather stunning $19,403,679 gross from 2,651 theaters. Certainly the all-time highest opening for a Coens' film (the previous benchmark was "The Ladykillers," which opened to $12,634,563), the Focus Features release opened well above expectations. Things weren't so good for all openers. Fred Ashman's doc "Proud American," released by Lightsource, opened on a strangely large 750 screens and grossed just $135,000. That amounts to a $180 average. indieWIRE will publish its weekly box office column Monday night and the full iW BOT Tuesday afternoon. Get the latest in the indieWIRE Box Office section. [Peter Knegt]