When nuclear fallout is falling the giant mutations come crawling It's us or it's them Don't haw and don't hem, 'cause only the end comes from stalling
They march in an endless advance across the vast desert expanse From bombs in a test, out somewhere Southwest, comes army of oversize ants
Them! (Gordon Douglas, 1954) were gigantic ants resulting from bomb tests. It was planned as a 3-D color film, but was shot in flat black-and-white-- except for the opening titles, which look very cool in color. Watch clips on Youtube, here. Image source: dvd beaver.