Fantastic drops due to crap competition.
Angels and Demons is not a hot target for Americans, Wolverine suffered from being shit.
Next Weekend Star Trek will be down to 20 million. Then the week after it will be down to 10 million, and then 3 million, and then it will fade away.
It will end under 250 million domestic, and under 80 million overseas for an worldwide total of 320 million give or take. Which will be great for the franchise i guess, but not spectacular for a 150 million movie.