I mentioned these before, but wanna get deeper into it: following two movies where created within the "duel project" between Ryūhei Kitamura and Yukihiko Tsutsumi. They got drunk together at some film festival in cologne, germany, and created a competition that would have two movies, filmed between 2002-03 under a predefined set of parameters, go against each other. Those parameters were:
2 people in a room, that would in the course of one week kill eachother. both movies turned out great.
fun fact: I saw the movies in a special back in 2005, where we paid 2,50 euros for both movies (played on a huge screen in a 200 year old lamp factory), a cup of noodles soup and as much vodka as one can bare. seriously. germany rocks.