A falling safe demolishes a yellow sports car. In the next shot the car can be seen intact on a monitor in the guards office.
At around six minutes the Hulk throws a heavy metal container and it lands on top of a yellow car which smashes, moments later the security guard is looking at the CCTV and one of the camera shows a yellow car. but undamaged.
When the Hulk breaks the wall to get out of the electrical room you can see a round conduit in the background and not the electrical room. It is obviously a shot from when he broke into the electrical room.
During the first Hulk-out, the Hulk pulls the sparking wires down, they continue sparking even though it is not connected to any power source.
The Hulk gets shocked when he grabbed the power cable; but he grabbed it by the insulation, not the sparkling end, so he shouldn't have been electrified.