Anyone hear the one about the four engineers driving down the road, all in the same car? There was a mechanical engineer, an electronics engineer, a chemical engineer, and an I.T. engineer. Suddenly the car loses power and they stop by the side of the road. The mechanical engineer expresses his opinion that the pistons have seized up in the cylinders. The electronics engineer states that the alternator brushes have probably worn out. The chemical engineer thinks that the petrol is probably contaminated with water. The I.T. engineer says 'Why don't we all get out and then get back in again..."