Grotus is a four piece heavy music band from San Francisco. Their sound incorporates lots of drums, 2 bass players, throaty vocals, guitar, and tons of sampled sounds of everything from yodeling pygmy trios to cartoon music to power tools. Lyrical themes include steroids in cows, drugs in people, humans in nature, war as entertainment, Zen, cosmetic surgery, cancer, environmental destruction, radical history, and so forth. Performances include projected video, huge volume, hair, sweat, Star Trek bits, smoke, and a healthy dose of Spinal Tap.