man, that was a really bad movie. It was "you got to see it to believe it" bad. It was entertaining to see, it had some humorous moments where it didn't take itself too seriously, but the movie was completely and utterly bad. Although I didn't personally hate the movie, I couldn't recommend it for any good reason and everything about the movie was just BAD. There's just no other word for it.
The acting was among the worst I've ever seen even in a B rated movie, even more so among such high profile/budget movies. And these are GOOD actors acting HORRIBLY, and I can't wrap my head around that. It's like they recorded a dress rehearsal and not the actual take, but there was no realism in the acting whatsoever, something I think is important in a movie like this trying to relay fear and "what if it happened" feelings. I'm not even the kind of guy that usually notices bad acting.
There is no explanation, crappy closure, ugh. I say you have to see it just to see how bad it is honestly, because it is still fun to watch at least in a few light hearted moments.
And of course, everyone leaving the theater had to put in their own "Now I want to kill MYSELF" jokes on the way out.