2 films we couldn't finish

Started 2 films last night and could not get beyond 20 minutes on either. One we should have known better, Cabin in the Woods, a "horror" film about a group of college friends who go off to a remote country cabin for the weekend, Blair Witch meets Deliverance, I think - moral of story:don't go! The other seemed more promising, Upstream Color, I even liked the title, but after 20 minutes neither of us could understand what was happening nor did we care. Maybe I was too tired and didn't give it a fair chance. Promos and reviews call it technically brilliant and abstract, about a couple struggling to put together their identities from fragments. Sorry, I just could not make sense of this - though it seemed like other films I often like, e.g., Holy Motors, this one was unfathomable.