Some facts for you:
Sets were built only as high as the tops of the actors' heads and computer graphics filled in the rest. But Liam Neeson was so tall that he cost the set crew an extra $150,000 in construction.
The sound effect when Obi-Wan Kenobi's lightsaber is kicked down the reactor shaft towards the end of the movie, is the same sound effect heard when Luke Skywalker throws his lightsaber away in Star Wars: Episode VI - Return of the Jedi (1983) when he tells the Emperor that he is a Jedi.
During filming Ewan McGregor made lightsaber noises as he dueled. It was noted and corrected during post production. (what a nerd!)
The sound of the "force field" in the lightsaber duel with Darth Maul began as a recording of the audio supervisor's neighbor's ceiling fan.
In the original trilogy, lightsaber activations and deactivations happened off-screen most of the time to prevent the "jumps" that would occur when the film was stopped to allow the "activated" lightsaber props to be substituted for the deactivated handles. This no longer poses a problem and every activation/deactivation occurs on-screen in Episode I.
Darth Maul rarely blinks throughout the film. This is mostly because the contact lenses that Ray Park wore made it difficult to blink and Park liked the idea of a villain who never stops staring
