Wanted
Oh shit!is funny;
Oh fuck!is not.
I finally got around to watching Wanted. It's a reasonably good film, fun and exciting with a novel turn. But it's badly let down by a terrible last line from the antagonist, as he realises that he's been set up for assassination: Oh, fuck!
I think it's meant to be funny, but it simply isn't. Oh, shit!
, now that's funny!