"Knowing" *SPOILER ALERT* When there are aliens/angel/whatever they say it is take the kids to a different planet/future earth/whatever you think it is. Then the final world ending seen. Best movie ever. *SPOILER ALERT*
Ehrm, Constantine had a pretty good ending, I guess. I liked the one from Inception, although they might've ruined it for me, but I'll have to watch it again to make sure.