thanks in advance for the help. a man and woman stand and embrace, as the world seems to be blowing up, with explosions and lots-o-fire. a chipmunk or some rodent is seen running into it's hole or something.....all three beings realizing...thats it, world bye-bye. end of movie.

I think it was in color. saw it in 1968 as a tiny tot. thought it might be When Worlds Collide...but nope.

Ahh..that would be Crack in the World. I saw this on tv a few years ago, very good underrated disaster flick, pity it's not on DVD.

http://us.imdb.com/Title?0059065

Thanks dom56!