When Louie falls down the hill, he's in an open meadow with barely a tree in sight. As the men form a human chain to pull Louie out, you can notice trees in the background close to them. As the tree they're holding onto snaps, they fall and you can notice that they are in a open field again as they do so.
When Tim is hammering on the tent stake, he breaks the handle of his hammer in half, it is a clean break. When they show him looking at the handle, it is broken to a point indicating it is not the same hammer.