I just thought this was interesting to think about: In this shot, Liam Neeson had to act as if he somehow quickly hooked his lightsaber onto his belt…when, in reality, he just dropped it onto the ground. 😛
OK, an actual “small detail” I never noticed until a week or two ago (also involving Liam Neeson):
You’ll need to go frame by frame to see it. As he whips his lightsaber out, his robes move in such a way as to indicate that Liam had the entire thing, blade and all, underneath his robes.