Kvelertak play a weird hybrid of hardcore, punk, black metal and rock-inspired heaviness. It's hard to describe. Think of Japan's Sigh, if they sneaked into Children of Bodom's recording studio and started flaffing around… well, that's hardly even close, but I can't say better than that. If you're not a fan of extreme music, then they may just sound like all the rest. Conversely, if you're familiar with fast music, then you'll be able to recognise how unusual they are. The eponymous Kvelertak is their only release to date, and it's full of promise. I look forward to more.
PS: don't try and make sense of the lyrics, they're in Norwegian.