Lord of the Rings: The Two Towers - Leaf of Lothlorian
When Legolas, Aragorn and Gimli first meet Gandalf the White in Fangorn Forest watch Legolas broach on his cloak. He says in Elvish, "Aragorn, something is out there," (there are english subtitles). During this sequence, his broach is pointing to the right and then to the left.
For some reason, they sometimes showed the scenes in the opposite directions from how they were shot (did that make sense? I mean like the negatives were flipped or something). In fact, during an interview with Billy Boyd (Pippin) they watched a scene from the movie and he said "I actually crawled up to him (Dom Monaghan, or Merry) from the other direction" and mentioned how it was funny how they had flipped it around.