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.
Chronicle (2012)
1 mistake - chronological order
Directed by: Josh Trank
Starring: Michael B. Jordan, Dane DeHaan, Michael Kelly, Alex Russell
Answer: Because he was a human being and Andrew was attempting to murder him in cold blood.
BaconIsMyBFF