You know when you watch a movie many many times and at some point you start to recognize its little errors,
like continue errors, things in the background (like the waving guy on the Nostromo) and small cutting errors.
And once you have seen these tiny things they can't be unseen when watching the movie again.
Usually it takes a few viewings for me to pick those things up.
But in the case of Prometheus I've seen so much mess in the first viewing that a second viewing made me cringe.
I liked the movie as much as I disliked it, but that's another story.
But the editing in the third act is REALLY TERRIBLE! It's so obvious.
For example when Shaw escapes the Juggernaut hangar and talks to Janek over com;
Vickers can be seen getting up behind Janek, then there's a close up on her sitting and then getting up.
Such things where very irritating even in my first viewing.
They tinkered so much with the images in post and couldn't get rid of such things?
Whatever, the editing sucks imo.
