I just remembered "Outbreak" (don't know if it's been mentioned already, can't be arsed looking).
Basically, half of the USA are collapsing and dying from some kind of plague. Then, the screen washes seamlessly into the next scene, and everybody's fine.
No mention of any cure, or any way to combat the pathogen. It magically cleared itself up, despite being the deadliest biological entity mankind had ever seen.
Fantastic viewing. It was the afternoon movie on five when I was on holiday once.
[hr]
" ... No-one knows what it's like, to be the bad man, to be the sad man, Behind Blue Eyes ... "