With regard to the Black Liquid the dead Engineers infected with it simply

water is the key to a good mutation,they said that it was 32 degrees inside the mound and the water wasnt frozen the water is screwed in the mound thats why firfield came out jacked up,when the double helix was destoyed at start of movie the rite away anew one was made it because engineer fell into all that water,down river bout 200 yards will pop out a predator mutated from an engineer by black goo.in the head room is a relief of a predator if you look good enough

and yes i found it its big as day,you cant miss it,

and yes i found it its big as day,you cant miss it,

the bodies are there because they wanted to try and cover the door up build up the bodies so that you couldnt see the door at a quick glance,be horrified at a stack of bodies then move on.slight of hand ask david blaine he will tell you all about it

To all That's the thing that gets me also : Did milburn and fifield get into the ampule room through the door that was left open or did they found another entrance into it ? If the engineers left the same way they came in I assume that the only reason they went there was because they : 1 Needed a physical barrier from whatever was chasing them . 2 The black goo that infected The decapitated engineers infection would become inactive in the ampule room as the atmosphere in it was prone to making the goo inactive as the ampules were unsealed and the air pressure was higher and there was some gas that makes you cough. that all point to a chamber that makes the goo inactive . Hence an infected engineer might be safe if we assume that the goo works through absorption via the skin as well because if it was ingested orally what is the point of going to the ampule room as other engineers who were infected through spatter(as I suppose the decapitated engineer was ) would get infection (I guess - dropped or broken ampule ?) That's my take . The non infected engineers would leave the same WAy they came out and went down opposite direction they came from . I guess something cornered them from both sides - maybe 4 or 5 ultra morphs (from the chestbursted engineers in the orrey room ) and those very powerful sliding jaws did the rest - but milburn noted that something burst out of them . Maybe ultramorphs who could inject like the original xenomorph in alien DC and but that the substance was so reactive that it simply exploded there where it was injected or is it possible that the ultramorphs could spit black goo that caused the infection ? Some thoughts .......... Peace And nice discussions

Given what has been previously said in this thread and many others I am probably going to sound completely insane at this point, but I don't think the engineers were infected by the goo in the ampules. I think it is the other way round, and the engineers infected the goo.

This is my thinking of what happened. There was an outbreak of some sort near the cargo bay. These engineers were infected but did not realise at the time. They head towards the ampule room to get away, and the door shuts to form a quarantine area. One of their members looses their head in the process. This group of engineers is already infected and they corrupt the atmosphere in the ampule room which corrupted the goo in there as well. The engineers become zombies like Fifield, and like Fifield become compelled to return to the juggernaut by whatever route they collectively take. The installation is also a giant reactor which feeds air and controls the temperature throughout the entire installation. We are given clues to this because of the temperature variations. I think the sub zero temperature that is mentioned is to turn water into ice and render it inactive, so that the humidity of the atmosphere in the ampule room does not react with the goo.The only engineer alive is the one on the juggernaut because that has its own life support system and atmosphere, and is therefore quarantined from the rest of the installation.

Batchpool- this is very cool. It might also offer a reason for Ridleys choices for the Fifield attack scene. The Engineers we saw piled may have been mutated, but not severely enough to burst out their suits, at least not entirely, by having grown to monsters half again their size. There is an Hitchcockian element to Prometheus, yes?

If an uninfected Engineer is able to launch a man into the air with a punch, then one infected is a good reason to run.

I know what they were thinking when they were running..........."we should of made guns too, damn i wish we made guns"

@meshuggah Just looking at the pic you posted. I dont really see the one with his chest bust open, they all look like their heads exploded. Millburn didn't say it looked like their chest exploded, he just said it look like it exploded.

Which builds a case that all the more seems to be leaning towards my original thread possibility...