Back around '91 I was driving on one of those big California four-lane (in one direction) freeways ... and there was a corvair six-cylinder engine sitting in the middle of the freeway. It may have fallen out of a truck, but there it was sitting upright, pointing straight down the road, and on each side drivers buzzing by at 65 mph ... it reminded me of the old saying "it only takes four bolts to change the engine".