The Changing Murals...

Was thinking that myself, so many plot holes and unexplored things for my liking

Agreed. It's like Ridley just threw wayyyy too much into one film. . .

When the urn chamber door was opened, the atmosphere inside the room changed and started to cause a reaction... just as it did with the urns.

When Shaw discovers the upper mural changing she says we affected the atmosphere, Of course the crew changed the atmosphere when the door was openned let alone everyone moving about the Big Head Room. On an expedition like this would all of the crew members be listening to everone on one channel so to speak? Shaw calls out to Charlie about the murals changing but the next scene shows David listening in and reacting, To my thinking there would be a way to talk only to Charlie if it didn't affect others in the exploring party. It seemed to me with David hearing the news od changing mural like they had found out something that David didn't expect others to find maybe till later. Also when the Shaw discovers the mural changing , David is dealing with oozing urns and Hollloway is trying to decipher the Wall mural and Green stone table. I would have liked to see if what Holloway was looking at would also have changed with the atmosphere disturbed with just a little more time.