When the cross shield/box is opened, the banshee's head is upright on the crossbar. But considering that the crossbar is on top of the head when the sides chop it off, the head should have been upside down.
When Duncan answers the Iphone in the mansion, the voice from the professor sounds as if she is just right next to him.
Based on the speed and position of the slider bar, the video clips they watch should be much shorter.
Lance Henriksen's name is misspelled in the credits.