 When the OConnells run out of the museum after Rick rescues Evie,  there are four mummy guards chasing them. However, in the ensuing  bus battle scene, only three are killed. According to the original  script, the fourth was supposed to attack Alex after the bus had  come to a stop. However, director Stephen Sommers (qv) decided to  cut the scene, figuring that the audience had had enough of the  mummy battle and wanted to get on with the story.