Fire Truck Maintenance

As I drove to Art Class today I saw the firemen checking the fluids, etc. under the cab which was flipped open.
I drove to the other side of the intersection, parked, grabbed the camera, sprinted to the corner and blipped.
Meanwhile... they were closing the hood (observe the yellow extension cord release the one fireman is holding that is plugged into the side of the cab, so the blip isn't nearly as interesting as the original scene.
BUMMER!