When I'm 21 is an inspired example of progressive and innovative documentary film making, a complex and poetic exploration of what it's like to be young and homeless on the streets of Glasgow. A palpable, internal tension seeps out of the narrative - interviews with forgotten fatally optimistic teenagers float within a sea of nihilistic visual and sonic symbolism. Culturally this film speaks volumes about our Western 'civilisation'; artistically, it is an extraordinary piece of work.