At the end of the movie, Chris is talking to Annie about reincarnation. He can be heard saying "A whole human lifetime is just a heartbeat here in heaven. Then we'll all be together, forever." The camera angle changes to the side of his face after the word "heartbeat" and his lips don't match the rest of his words.
When the little girl gives half her sandwich to the little boy on the dock, he takes the other half, and hands the first one back to her. As he hands it over, there is a bite missing in the middle. When she goes to eat it, it is whole.
When the bird drops paint on Chris, the shot from above shows it hitting the top of his head and his shoulder. When the angle changes, the paint is on the side of his face and his shoulder, with none on top of his head.
In the arrival to the 'Library', the camera makes a long-shot where it appears a great hall with a lake like ground, without corridors nor bookshelves. When seconds after Chris and Albert fly from the boat to the Tracker this one is reading a book between two bookshelves, floating in a corridor (located in the middle of the great hall) that wasn't there before.
The two car crash scene in the tunnel is created using the same car whilst being shot from two different angles. First its the Porsche 911 launching in the air, seen from outside of the tunnel. Then, when Chris is in the tunnel helping the victim, he is struck by oncoming car - its the same Porsche 911 , launched in the air, but shot from another camera angle.