Opening weeks haven't really been too bad, it's the legs that have been dissapointing. Malf and DOFP have both done well in that department.
Godzilla.......so dissapointing after such a great OW.
Few movies that I've felt that with....
Percy Jackson 2 ( I had to stay and watch the whole thing though because my friends, although pissed, wanted to see it too the end)
Bewitched
Jack and Jill
I'm sure there are others, just can't think of them.