If you watch Black Swan backwards, it's about a dancer who cures her insanity by sleeping with Mila Kunis.
If you watch 127 Hours backwards, it's a lovely story about an amputee finding an arm in the desert.
The King's Speech
If you watch The King's Speech backwards, it's about King George VI of Britain losing his crown and slowly losing the ability to speak coherently.
If you watch Inception backwards, you still wouldn't understand what the hell was going on.
Toy Story 3
If you watch Toy Story 3 backwards, it's about a college kid who comes home from school to steal a little girl's toys.
The Social Network
If you watch The Social Network backwards, it's the story of Myspace.