Tonight, Ministry are playing from behind a cage, which surrounds the stage. As this is apparently their 'final' tour, it could perhaps be a throwback to their early gigs - it's well documented in the movies that if the crowd doesn't like the band, the bottles start flying, and there's always a cage to take the brunt of the assault. Maybe it's to give the band a more feral stylistic, likening themselves to caged animals as they play. Maybe there's no reason other than to look cool, which it does, so let's assume the latter for argument's sake.