Liam Neeson apparently was a danger on set because the jedi have like four basic moves but he was trained for swordfighting for Rob Roy so he would wave his plastic sword in new and interesting ways that would not be choreographed but were traditional actual ways to fight with a sword

To be fair, that does sound like something Qui-Gon would do.

between Liam actually knowing what he was doing and Ewan not being able to stop himself from making lightsaber noises it's a wonder the Phantom Menace got made at all