Not perhaps since a drunken Paul Westerberg of the Replacements started screaming "Fuck!," or not perhaps since Morris Day posed the eternal question "Where the fuck this chicken come from? I thought I ordered ribs!" or even perhaps since the Sex Pistols were unable to even make it into America at all has Saturday Night Live seen such an extreme and in your face musical performance. On Saturday night, stick-thin Canadian Win Butler, the lead singer of a music group called Arcade Fire, reinvented the art of rock performance with a single drastic act of nihilistic destruction. Who are these very scary young comers? What won't they do next?