From Deseret News:
Friday night, managers at the Megaplex Theatre at the District, 11400 South Bangerter Highway, switched one of the showings of “High School Musical 3: Senior Year” to a larger auditorium to accommodate more people. They forgot, however, to switch the movie that had previously been scheduled for the room.
So rather than the family-friendly, G-rated “High School Musical 3,” the beginning of the very nonfamily-friendly R-rated “Sex Drive” came on the screen. The opening minutes of the movie include nudity.