It's easy to laugh at nu-metal 15 years after the event. Brush it off as that rap-rock fad that briefly turned Fred Durst into a chart-topping mega-prick and gave goblins like Mudvayne an excuse to paint themselves silver. But it was more than just a passing phase. So gel your spiky hair, adjust your wallet chain and turn up your CD hi-fi for this lot. The nu-metal bands you'd maybe forgotten.