Corrected entry: The three characters are playing with Legos near the beginning of the film. They are sitting next to a mirror, and we see Andrew building his Lego structure. Andrew is reflected in the mirror but the Lego structure is not, indicating the use of CGI.
Chronicle (2012)
1 corrected entry
Directed by: Josh Trank
Starring: Michael B. Jordan, Dane DeHaan, Michael Kelly, Alex Russell
Revealing mistake: When the three characters are playing with legos and Matt is told to start playing music from his ipod, you can see that the sound is off and the ipod is paused when the music is apparently playing.
Matt Garetty: Andrew, don't fart; we'll never find you again!
More trivia for Chronicle
Question: Why did Matt save Andrew's abusive father?
Answer: Because he was a human being and Andrew was attempting to murder him in cold blood.
Correction: Matt is sitting in front of the mirror in the position where the reflection of the Lego would be, and therefore obscures the view at that position.