If you watch the movie Jaws backwards, it's about a shark that keeps throwing up people until they have to open a beach.
If you watch Lost backwards, you realize it's the same thing as if you watch it forwards.
If you watch Heroes backwards you realize it's getting progressively better over time.
If you watch House backwards, it's still never lupus.
If you watch Rambo backwards, it's Sylvester Stallone healing people with his magical bullet vacuum.
And repairing helicopters with nothing but a bow and arrow.
If you watch the 1997 version of Episode IV, Greedo shoots first.
If you watch Memento backwards, it totally makes sense.
If you watch The Lord of the Rings Trilogy backwards, it's a saga about a little guy who gets a cool ring from a volcano and spends the rest of the three movies walking home.