Exactly, it's fictional technology. Fictional ALIEN technology. You're trying to rationalize and restrain a movies concept based on the logic and facts of HUMAN REALITY.
Yes, technology, not bloody
magic. I take it you are very much not familiar with the idea of hard and soft science fiction, internal consistency, or common literary pitfalls. This is just a lost cause.
Fictional worlds establish rules, explicitly or implicitly stated. Sometimes--due to poor writing--fictional worlds break their own rules, defy their own rationale, or spontaneously introduce new and inconsistent elements.
For example. District 9 takes place approximately in the the near future. The earth's technology in the movie is about comparable to our own. Seeing people fly in helicopters is consistent with the time period and technology level the movie has established for humans, consistent with the rules. Seeing people flying around in hover cars or jet packs is, while still a fictional element in a fictional movie, not consistent with the technology level the movie has establish for humans.
The movie is attempting to be fairly hard science fiction. Technology isn't so much magical as it is advanced in District 9. Heroes, the American tv series, is an example of soft science fiction where a genetic mutation can allow a person to manipulate time and space.
Being harder science fiction, the idea that a "fluid" designed to operate alien technology could do something as improbable as mutate a person into an alien breaches the hard science reality the movie has established. Shooting myself up with dog dna, sleeping in a dog bed, or doing other dog related stuff doesn't turn me into a dog. Specific, controlled mutations as an unintended consequence of an accidentally administered substance are inconsistent with the hard science the movie has tried to establish. The movie doesn't allow for for this to be a realistic possibility.
This is a common mistake in fictional stories. Authors do not take time to carefully plan the story universe out before they begin writing, so new elements are introduced seemingly spontaneously into stories without developing them cohesively into the universe. The writer wants to get the story somewhere, but hasn't adequately planned a route to take it there. Edited, Aug 21st 2009 11:01pm by Allegory