Visible crew/equipment: In order to escape, the lonely Cap. Boyd is struggling to walk down the mountain at the upper right side of the screen, but there is a quite calm man standing at the bottom left corner at the same time, apparently watching the main actor's (or his stunt's) performance. To make it worse, then another member of the crew arrives, and both seem to wear modern clothes (fullscreen version). (00:52:20)
Visible crew/equipment: When the characters walk through the snowy woods, just before reaching the cave, Colhoun kicks a patch of snow that seems to fold in half, as though it is a towel or blanket.
Answer: It is called "Manifest Destiny" and was done by Michael Nyman and Damon Albarn. It is on the soundtrack.