Continuity mistake: In the beginning, during the initial battle sequence, there is a scene where some men on horses go up a little hill, over all these dead bodies. The body right in the middle of the shot jumps two different times when a horse runs over his legs.
Continuity mistake: When the hero and heroine are kissing, you first see it from behind him looking at her face. From that viewing angle they both turn their heads to the right to kiss each other. Then we see it from behind her and in front of him, but now they are both turning they heads a little to the left.
Continuity mistake: When the fat guy who gets the beetle in his brain runs into the wall, his shirt is untucked. The camera changes angle and it is tucked in. (00:47:50)
Continuity mistake: When the mummy is initiating his new slave, he offers him jewelry and shows him a sacred jar. Where did these come from? He wasn't holding them before in that same scene. (01:07:45)
Continuity mistake: When Imhotep and his zombies are going after the group in the building where Evie reads to locate the other book, watch the mummy's CG mouth when he is walking in the zombie crowd, raises both hands and shouts something. You can see in that scene the CG decay shift on his face a bit.
Continuity mistake: Just out of curiosity, where did the bandage come from on Fraser's hand at the end of the movie? [He got burned by the salt acid in the deleted scene. An explanation, but given the editing, still a valid mistake.] (01:55:25)
Continuity mistake: When O'Connell and Evie burst in on the mummy after it has killed Burns, O'Connell aims at it with one revolver in his right hand. As the mummy advances, he suddenly has two revolvers in both hands, and before that, he has made no move to his second gun.
Continuity mistake: As the sun is rising, Hamunaptra is revealed (a literal trick of the light). However, long before the sun is fully up (let alone directly overhead), Dr. Chamberlain is seen holding an umbrella over his head, blotting out the sun which is now shining directly *down* on him.
Continuity mistake: When Rick is fighting Benny on the camel when they are riding towards the temple Rick and everything else is in shadow in some shots even though the sun is high up and there are no clouds. (00:38:30)
Continuity mistake: When Henderson gets killed by Imhotep in his hotel room, the shadow of his corpse being thrown shows it to be thrown quite a distance across the room, yet when Imhotep appears, and then walks off, Henderson's corpse is right by his feet. It was thrown much further than that.
Continuity mistake: Following the attack of the Magi on the adventurer's camp, the short sighted American's shaving foam changes from shot to shot.
Continuity mistake: In the scene where Evie, Jonathan, Rick and the fat guy drop down into the mummy preparation room, you see the fat guy pick up his tools and start walking forward, then in the next scene, you see the exact same thing. (00:41:15)
Continuity mistake: When they show Anck Su Namun committing suicide at the beginning, when the Pharaoh's guards show up she whips around to face them and all of her hair goes over her left shoulder. None is left on her right shoulder. However, in the shot from the front, she has half of her hair over each shoulder. (00:03:20)