Maybe it's the phantasmagoric appeal of staring into a dark abyss scattered with hallucinogenic blasts of light. Maybe it's the commodious vibe of gathering with fellow fans. Or maybe it's the ease with which the darkened venue enables you to engage in less-legal modes of transport. Either way, the weekly Pink Floyd Laser light show at the Pacific Science Center is the perfect vehicle for those looking to explore the bright side of the early '70s.?Chantal Anderson