movie scene guy keeps walking while being shot by everything

Sequence of five shots, each one with a particular color treatment, in which a man carrying a machine gun runs. He moves fast in the beginning but, as the end comes closer, he starts to walk in zigzag. Is he hurt?

Nothing but the feet and legs of a man are shown, inexhaustibly walking through the desert, mud, rivers; over rocks and mountains, over a rooftop where he ultimately loses his balance and drops to the ground. The sequence could be seen as a story, unfolding between life and death.