Seems the trick is to stand in primark yob atire with you hands behind you back, lean forward as if suffering from lower back pain due to chronic constipation, and emit a two note nasal whine that is the human equivalent of a defective dog whistle, and recite abonimabley puerile lyrics to a three chord dirge. Oh, and being posessed by fookin' Lennon may help. I think a disembodied Lennon would have far better taste myself, to say the least. Utter bollox.