I'm pretty sure I remember reading somewhere that it was the nighttime scene on Tatooine with Anakin and Qui-Gon.
If you look at that shot where Anakin says "I want to be the first one to see 'em all," there's just something .... off-looking about it.
I'd also be curious to know just what make/model of camera was used. If this was part of principal photography it would've been the ancient past of 1997.
EDIT: Jaws beat me to it