We'll handle this.—Qui-Gon Jinn, Star Wars Episode I: The Phantom Menace
Darth Maul engaged Qui-Gon and Obi-Wan in a furious lightsaber duel. The trio fought through a pair of blast doors connecting the hangar to the Theed Generator Complex. On a catwalk across the Complex the duel raged for a long time, Maul being a more formidable opponent than either Jedi had ever faced before; wielding his double-bladed lightsaber with vicious efficiency. However, despite Maul's seeming dominance on the battlefield, he continually gave ground over the entire battle, leading the two Jedi into a labyrinth of catwalks.
The catwalk met a hall with laser fields. Obi-Wan had been knocked down several stories by Maul, and by the time Obi-Wan caught up to the two combatants, he was imprisoned by laser barriers. This left Qui-Gon to duel alone with Maul. Despite being considered one of the best lightsaber duelists in the Jedi Order, Qui-Gon could not keep up with the Sith Lord's youth; this coupled with the restriction of the narrow catwalk around the melting pit, which kept Qui-Gon from using his Ataru style to its full capacity. Eventually, Maul slammed the wide handle of his lightsaber into Qui-Gon's face, stunning the Jedi Master, and the merciless Sith Lord quickly took the moment to stab Qui-Gon in the chest, while Obi-Wan could only watch in horror. Finally the laser fields switched off, and Obi-Wan ran through to avenge his master's fatal blow.
Overcome with hatred, Obi-Wan lashed out on Maul and succeeded in slicing the Sith Lord's double-bladed lightsaber hilt in half, leaving Maul with only one blade. However, the Sith Lord remained in control and eventually Force pushed Obi-Wan into the melting pit. The Jedi Padawan clung for his life on a power node and watched as Maul kicked Obi-Wan's fallen lightsaber into the pit.
As the Sith Lord taunted him with lightsaber strikes on the edge of the pit, Obi-Wan was able to relax his nerves and focus on the light side. He flung himself out of the pit, Force-guided his master's lightsaber into his hand, and landed with a single sweeping death blow.
The Sith Lord fell into the melting pit, neatly sliced in two. By then, the rest of Naboo had been liberated and the Invasion of Naboo was over.