The Two Items (possible spoiler)

Rating: 9/10 (12 August 2005)

I thought "The Descent" was fantastic. I was a little puzzled with the ending, and some other things that happened throughout the movie, but they're now apparent. Anyway, I was just wondering if anyone noticed the two items from the cabin that also appear in the cave (but only for Sarah). When Sarah and Beth arrive at the cabin, and Juno arrives, Sarah goes into the cabin. But before that she puts her hand on a post, with some sort of bone or animal object on it, and I can't remember fully, but she's like "yuck" or something. Then the camera switches to show Sarah going into the cabin, and it gives you a clear view of a little tin object I think, with a face or pattern on it.
Sarah finds these exact objects in the cave. The tin thing just before she spots the first crawler, and the bone thing she used to kill the female crawler, by stabbing it into its eye.
I'm sure some of you may have noticed this. Sorry if it's been mentioned before in other threads; I haven't read them. Anyway, my question is: what's that all about? I have an idea that the simple answer is to do with Sarah's mental state, so she see's those objects in the cave. However, she didn't notice the little tin object at the cabin. Lol, I'm confused. Maybe it's just meant to be that way.
Your views would be nice to read ;)