At the end, when Boden comes home, his wife and son are playing on the floor. There's a tray of toy cars and trucks and the son is pretending it's a plate of food that he gives to his mother. She picks up a yellow truck to "eat" but when the camera angle changes, it is a white truck. At another camera angle change, all the toy vehicles are gone except for one.
When they save the guy from the grate, the rescue line they use is uneven when they first put of the ladder. One side is on the fifth rung up and the other is the 3rd rung up. Yet in the next shot with the line visible, both sides are on the forth rung up.