If this is the kind of wild unpredictability that is being fostered by the feverish networking and cross-referencing of the MySpace generation, then bring it on. Shiny three-piece Pull Tiger Tail are a fabulous pile-up of ideas, as playful and unexpected as their name. They ram dynamite into accepted notions of musical genre and watch as the debris lands in delightfully unexpected combinations.

Listening to their three singles to date, you might have them tagged as a kind of Home Counties post-emo power trio. Great as those records are, however - indelibly melodic and puppyishly energetic in all the most appealing ways - they are scant preparation for a song as remarkable as Hurricanes.

Hurricanes is the Smiths, Fugazi, Ride and Big Star mashed together in one breathless whole, a plaintive verse giving way to a lighters-aloft singalong chorus and vapour trail guitar shimmering over choppy, angular rhythm. Why Call It It? might be even better, with singer Marcus Ratcliff's staccato falsetto recalling the crazy grandiloquence of Sparks. It's About Consumption unfurls a florid melody over rolling, organ-like synths, building gradually into a thunderous stomp that sweeps all before it.

Just when you think you know where they're coming from, the band wrongfoot you: there's an earnestness that suggests American post-hardcore, and a post-punk willingness to experiment but, more than that, a gleeful sense of post-everything anarchy. Songs end precipitously, as if suddenly blowing their own fuses. "I'm addicted to electric pulses," sings Ratcliff, thrillingly, at the start of new single Let's Lightning, which really is the best way of summing up his band's manic brilliance.

· At Newcastle Academy tonight (0870 7712 000), then touring.