wind-up car
9 of 12 from Images: The inner life of gadgets
The Radiology Art site says of this wind-up pace car: "The driver is easily visualized behind the steering wheel. Perhaps the most interesting part of this image is the spring, whose loose coil can be seen directly to the right of the driver."
You can also make out the wind-up key to the left of the driver. From this perspective, the key looks like it's the steering column.
April 1, 2009 2:03 PM PDT
Photo by: Courtesy of Satre Stuelke, Radiologyart.com