Continuity mistake: The pharaoh realises that his mistress Anck Su Namun was touched by another man because the body paint on her left shoulder is smudged. However, the way it is messed up differs drastically between when it was being smudged by Imhotep and when the pharaoh points to it. (00:02:40)
Continuity mistake: At the beginning of the movie when Evie is putting the books back, she is standing on the ladder leaning against the bookshelf and the top rung of the ladder is at mid thigh. When she reaches and the ladder stands up the top rung is at breast level. (00:13:00)
Chosen answer: The tattoos on his forehead are the Egyptian Hieroglyphs that spell "Underworld", and the ones on his cheeks are the Egyptian Hieroglyphs for the word "truth." All Medjai males get these tattoos as part of the coming-of-age rite, when they turn sixteen, of which the most important is the tattoo on their right wrist (which Rick O'Connell also has) that marks them as "warriors for God." Other tattoos specific to Medjai males are on their arms, forearms, hands, pectorals, shoulder blades and beneath the navel - the tattoos on the nose and chin are no longer used, since the time of Seti I. Medjai females only get the wrist tattoo when they come of age, but are not marked with any of the other symbols that are particular to men. Fun fact: If the Medjai - male and female alike - shows any sign of pain or cries during the tattooing process, it is considered that they have brought shame to their family.