What are those energy field things during the fight between Obi-Wan and Qui-Gon and Darth Maul?
Those red energy fields that separate the two Jedi from Darth Maul during the final duel on Naboo are called “electron gates” or “laser gates” and are part of the makeup of the power generating complex. They serve as a security barrier to the dangerous melting pit. They also happen to be a handy plot-device. George Lucas has addressed the fact that some fans were confused about this and said that he may add additional scenes in a “Special Edition” of the film to clarify it.