The pictures posted by Ingeniero seem to show a space jockey helmet encapsulating Shaw's head, very similar to the scene in Prometheus where the engineer activates the helmet. You can see the mandibles and the top plates. They move inwards with each frame, the snout seems to be forming and the black eye covers are visible. The eye covers also move forward, as if moving into place, with each frame. The entire recording could also splice together a series of small recordings, which wouldn't be clear in the trailer. This much discussion is mission accomplished for Fox and Scott, either way.