A couple of things I have picked up after three viewings

Firstly, it hit me last night after watching it the third time that the noise that the new 'deacon' makes when exiting the Engineer in the exact same noise that is heard when David first plays the hologram of the Engineers running away down the tunnel. So to me it is now 100% clear what they were running away from. Also secondly, in the concept art book there is a mural of the alien egg held in hands, this is in the movie, and is briefly as Shaw is staring up at the ceiling as it changes due to the change in atmosphere. Has anyone else noticed these? Or anything else?