Continuity mistake: After Emily hits the fire hydrant, we see water coming down on the windshield with great force. The shot cuts to outside the car, and we can see that the windshield is getting hit with water much less severely than it was a moment before.
1.08 (Depraved Heart) Lightman is working late and his daughter drops by to bring him Thai food. As she's walking towards her father, her arms are crossed. Cut to the immediate shot from behind, and her arms are down at her sides.