This scene where Fifield is killing his mates is happening when Weyland want go to the Engineer, and not during his awakening from the hibernation, holy theatrical cut, i can't wait for the extended cut.
In the trailers Janek said: "Kill everything! Do you copy me!?"
This isn't in the movie, i wonder what's the "everything" is meaning.
And in the aduio puzzle, the Fifield-Millburn vs Hammerpede scene creepier, i hope we will got that in the extended cut.