Revealing mistake: In the scene of Tod's death when we see the water leak creeping up toward him, if you look closely you can see the small holes in the tile grout where the water is being pumped up from below.
Revealing mistake: You can see the plane intact even though it has exploded. It stays complete, there's just fire around it. (00:18:55)
Revealing mistake: In the scene where Carter drives madly down the road to get to Alex, and Billy is riding his bike along the street, just before Billy gets knocked off you can clearly see it is a stunt double.
Revealing mistake: When Alex is running through the woods and is sliding down the hill, just before he stops himself from being impaled by some branches, you can hear someway say "Look out." It can't be the agents following as they're too far away.
Answer: It is "And When I Die" performed by Joe 90, based on the Blood Sweat and Tears song. It's available in iTunes.