.. I tried to watch it tongue in cheek ..
I absolutely mean no disrespect here, but I had to smile at this statement as I had an image in my head of you sort of shifting in your seat to adopt a different sitting position so that you became 'tongue in cheek'
anyway, i think it's a very marmite film. A mate of mine watched it and hated it because he completely didn't get it - he thought the stuff in the cabin was the actual point of the film. Me, I absolutely loved it - probably even edges "Looper" as my film of the year (although not by much..).