Denmark's Iceage has been a bit of a buzz band for the past year and a half or so. Oftentimes, such bands are unable to live up to the hype that surrounds them — but when these guys played to a packed house at Rhino, from the beginning it felt like you were in an important moment. The stark iciness of the music was clearly coming from a place of raw emotion needing an outlet, and the crowd was swept up in that energy. Sometimes a show like this can get boringly out of control, with violence eclipsing any possible enjoyment, but this performance felt like everyone present was of a single spirit and discharging pent-up energies together rather than against one another. That unintentional togetherness is one of the marks of a truly great musical experience and not common enough.