..A mechanical engineer, an electrical engineer, a chemical engineer and an IT engineer. They were driving down the road when the car suddenly broke down.
“It must be the engine!” Said the mechanical engineer.
“Hang on, it’s the battery, I know all about this.” Replied the electrical engineer.
“It has to be the fuel! I’m an expert on this you know.” The chemical engineer chimed in.
“Nah, nah. I know what it is.” Said the IT engineer. “We all have to get out of the car, and back in again.”