As these characters all move from isolated loners to relying on each other, the film never pounds its point in -- even the big set pieces are slightly askance, just giving more insight into the characters without preaching.
Director Danny Boyle ("Trainspotting") has a terrific eye, so the film as a whole is very well directed, with clever camera work that builds the tension and actually jolts us out of our seats a few times.
It's a remarkable film; the dialogue takes our breath away with its sharp skewering of expectations and realities, the bleak honesty is balanced by the freshness of real life and moments of raw truth and comedy -- Don't miss it.
The only complaint is that the plot ultimately tries to take over the character drama with twists, turns and some rather pointed preachiness. But at least it's fiercely smart about it. And Algrant's final shot is gorgeous.