(at around 53 mins) When Matt and Morton are taping flash lights to their guns, Morton clearly struggles with the tape and never actually gets a piece off with his fingers to attach the flashlight; however, in the next scene, he emerges from the building with flashlight clearly taped.
(at around 1h 19 mins) Towards the end of the film, a brick of C4 explodes when it is shot. C4 does not detonate when shot.
(at around 11 mins) Scaffolding visible in background after Matt falls in the pit.