Vanishing on 7th Street

This movie is really mysterious and starts with great promise - people disappearing in the darkness - well, this is frightening. It is not too logical - some things do happen but somehow contradicts the story logic (ie. small girl with solar powered flashlight somehow survives even if there is mentioned that the Sun rises only for a few hours, hardly to recharge the flashlight).

All right. I'm willing to accept even less logical movies like Japanese horror movies which often do not respect time or actual causality. However these movies usually do try to explain what his happening and why it is happening (with several theories how to resolve the situation, often wrong).

But there is hardly any explanation here, only "signs" which may be interpreted in many ways. The ending is sudden, hardly explains anything and left me unsatisfied. Is the happening local or global? Is it transitory or final? Is it demonic or end of the world caused by God? The movie focuses on (not too successful) attempts to survive but provides way too few answers. The feeling is depressing, which is good, but I really lack the climax. The ending was somehow abrupt and unsatisfactory. I like it, but it is only "good", not "great".