The power of heavy metal meets the dark energy of demonic possession in the trailer for Deathgasm. This New Zealand horror-comedy, whose splatter and over-the-top sense of humor recall Dead Alive, concerns the members of a high-school metal band who literally raise Hell when they play the most metal song in the world, conjuring up an army of undead demons that possess those around them.

Deathgasm played the midnight program at SXSW, where it was well received by audiences for its practical effects, funny characters, and the fun it has with the subject matter. The film will be released in limited theaters in October, and those interested in shouting at the devil can find out more on the film’s website.