Brown Bunny was shot on an Aaton Super-16 camera and then blown up to 35mm. I used to have a copy of the eBay listing Gallo wrote when he sold the camera package after the shoot. It was one of the most unintentionally funny documents I've ever come across, especially if you know anything about the man and even a glancing knowledge of the technology.
Want some real entertainment? Do some internet searches to learn about the "feud" between Gallo and film critic Roger Ebert. In a nutshell, Ebert saw a rough cut at Cannes of Brown Bunny and didn't like it. Gallo reacted in a typical Gallo way, saying something to the effect of "he should get cancer." When the film was later recut and eventually released, Ebert saw it again and gave it a positive review. Gallo remained, well, Gallo. Years later Ebert actually got throat cancer and Gallo, again, was Gallo.