Almost at the end of the movie, an EMT is putting an oxygen mask on one of the survivors. Blood is visible on the mask before it comes in contact with the blood on the survivor's face.
About 25 minutes into the movie, when Pierre takes a long walk to the Library/Dean's Office, two joggers in university sweatshirts pass him. A few seconds later, the same two joggers emerge from a building about 50 meters away and run towards him.
The plot implies that identical twins have the same finger prints, which it's false.
A cameraman is reflected on a glossy tombstone during the tracking shot when Max Kerkerian visits the cemetery in Sarzac for the first time.
Reflected in Niemans' glasses as he talks to the female climber before the descent.
The shadow of the camera can be seen on the dead body in the morgue.