District 9 is an incredibly intense movie, action packed, emotional, controversial, the movie did amazing things with an very tight budget. Apart from the main theme of apartheid, there is also a relationship to technology, machinery, weaponry, and transformation. I blitzed through the movie again to get to mech but stopped through at many of the scenes when the protagonist was in the process of transformation.
The Alien technology that the protagonist is exposed to begins to alter his physical form, slowly making him into an alien himself. What interested me in particular was the first stages of transformation, his left hand starts to mutate beginning with his fingernails, but quickly escalating into his entire hand, violently. This initial stage of the transformation enables him to access the alien technology and weaponry, while his right human hand still grants him access to human technology, particularly fingerprint scanners, computers and cars. Eventually he gains access to the alien ship, which is controlled through a slimly gel interface which he must sink his hands into, again an emphasis on his hands serving as his primary interface with technology.
In the last showdown of the movie the protagonist gains access to an alien mech, an armored bi-ped robotic exoskeleton, a war machine. I've taken multiple shots of the mech posted below, there are a few things I really like in the design. first, the design of cockpit puts the operator under the shoulders, within the rib cage. It also extends forward at the hips creating a place, almost a cocoon for the drivers legs. No clue where the hands go, but it seems the mech is controlled mentally, reducing the drivers input to only brainwaves with no physical in-put. The layering of the armour is also impressive, I like the shot where the Protagonist opens the chest plate to be able to speak face to face with his befriended alien counterpart.
The final shots of the sequence are the most interesting for me. The armour, after taking significant damage, is destroyed, the Mech falls to a kneeling stance and spits the main character out, it then falls backward away, like a shell, laying in a defeated heap as the protagonist crawls from away from the debris.
In conclusion the technology protects the Protagonist an allows him to overcome most of the forces which assail him throughout the movie and during the final battle. However, his final salvation is not in the machine, instead, the creatures he initially oppressed and sought to control, step in and save him during the final stages of his transformation.