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)
Suggested correction: I've checked the time where this alleged mistake occurs, and there is nobody standing there. All that can be seen on screen are rocks, Boyd (Pearce) walking, and snow.
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.