Squeaky-clean-sounding albums make listeners wonder if the bands will be able to re-create the energy in a live setting. But on Jumbo's Killcrane recordings, songs writhe under layers of smothering fuzz, raising questions about whether the band sprays them off before showcasing them. Fear not, sludge lovers: Even in concert, these tunes stumble through their own filth like mammoths stuck in tar pits. Grunge in the dirtiest sense of the word, Killcrane takes that genre's framework and adds prog rock's experimentation and metal's volume. Road tested on a marathon tour, the Lawrence trio's sets now come complete with oil stains and bug-speckled teeth.