Very Well Done Movie - with One Caveat

Rating: 8/10 (1 January 2010)

At first, I was thinking that this was going to be another movie done in the vein of "Cloverfield" (IMO, the worst done movie cinematically, second only to "Blair Witch Project), but was pleasantly surprised to find there were very well thought out action sequences and a strong plot.
The images of District 9, can only churn up remembrances of apartheid, and how the aboriginals were treated in South Africa. When the two aliens were fighting over the tire, I thought there was going to be a human fire necklace kind of reference.
Anyway, my only real problem with the movie, was the importance of finding the minute amount of material to process, that was used to create fuel needed to power a ship nearly the size of downtown Johannsburg SA. My question is, if this is the only thing that was stopping them from returning home, why could they have not carried an extra case or two of these 10" cylinders of fuel? As long as you don't dwell too long on this poor plot reasoning, the movie is extremely enjoyable.