'Spun' is a frenetically paced trip taken by people going nowhere fast, caught on a web of their own spinning. More subtle, but no less devastating, than 'Requiem for a Dream' in its depiction of pharmaceutical crash-and-burn, it lets the characters' tragic trajectories speak for themselves instead of preaching an anti-drug gospel from some elevated pulpit. A sleazily compelling insider's view into the nihilistic, self-deluding world of crystal meths.