* AdaptationFirst: It's based (very loosely) on the short story "Memento Mori" by the director's brother but that story wasn't published until after the film opened. It's included on the DVD.
* BreakthroughHit: It was [[Creator/ChristopherNolan Nolan's]] first big hit as a director.
* HeyItsThatGuy: Watch it now, and you'll say, "It's [[Film/TheCountOfMonteCristo Fernand Mondego]], telling [[Film/TheMatrix Trinity and Cypher]] about [[Film/GroundhogDay Ned]] and [[Series/{{CSI}} Sara]]!"
* ShrugOfGod: The DVD commentary splits into three parts in the last scene, one saying that [[spoiler: Teddy was lying to Leonard]] one saying [[spoiler: he is telling the truth]] and one [[spoiler: not saying either way]].
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