Alfonso Cuarón's beautiful coming of age movie is currently streaming on The Criterion Channel, and is absolutely worth your time if you haven't seen it.
Cary Elwes actually suffered from two different injuries during production, including one that happened while shooting a scene and ended up in the movie.
He awoke to find himself trapped in the past, facing mirror images that were not his own, and driven by an unknown force to change history for the better.