knitting commences @ the two minute mark. I would venture to guess that Nanatoo is partial to metal knitting needles.
Episode summary from TV.com:
n an attempt to impress two goth girls, the boys stage a seance in their front room. Trouble ensues when they summon the most evil demon known to man, an old lady called Nanatoo who does a runner with their flatmate, the Shaman Naboo's, most magic book. Naboo is livid and gets drunk, leaving it up to Howard and Vince to find the demon, retrieve the book and prevent Nanageddon.