Revealing mistake: At the beginning of the "Day 50" scene, there is a shot of the "human" meat thawing - in the top right of the screen, a pig snout is visible. (01:13:00)
Suggested correction: There is no pig snout. That is the end of a sleeve that has meat in it for their trip.
Revealing mistake: When Roy digs out Antonio in the snow, you see his mouth move although he's dead.
Revealing mistake: When the guys drag the one dead guy out on the sleigh, you can see his stomach rise and fall slightly.
Revealing mistake: When Antonio cuts into the human meat, the 'chunk' he pulls out is obvious shreds of steaming chicken with tiny brown spots, than frozen human flesh.