I'm trying to find the title of a movie that I saw many years ago, whose ending left a deep impression on me. I only saw the movie once, but this is what I seem to remember:
There was a box containing "something bad", like a Pandora's box. The box remained unopened until the end of the movie, except I think at one point someone opened the lid a little bit and a brilliant burning light streamed out, so they quickly closed it again. Eventually the box was taken to a house on a beach, where two people opened it. They peered into the top of box with a look of horror on their faces, white light poured out of it, then "all hell let loose", they went out onto the beach and saw that the sea and the sky were changing in a manner that suggested something apocalyptic was happening.
Thanks in advance for any replies.