During the plague when the fire and rocks are falling from the sky, they fall behind a statue of Rameses and are seen through its hollow eye holes. It makes for a great image, but that would mean that the statue's eyes were punched out like a mask, even though before they were just carved into the stone.
2 differences between The Bible and the Movie. 1) Aaron did not doubt Moses in the Bible. In fact Aaron did most of the speaking before Pharaoh and actually performed some of the miracles. 2) Moses murdered the Egyptian task master. He did not accidentally kill him. Pharaoh wanted to kill Moses because of this, not try to convince him to stay.