When I was in college, we demonstrated how two connected cones could appear to roll uphill and defy gravity. It was done thusly: The large ends of two cones were glued together and a wooden slat was cut in half along the long diagonal; then the lower ends were glued together at about a 30º angle. The connected cones were then placed near the lower end of the wooden ramp, and without any help the connected cones would roll upwards, toward the higher ends. Naturally the connected cones were not defying gravity. What was happening was that the center of gravity of the connected cones was always lower than the ramp, so, from the connected cone's perspective, it was rolling downhill. Although I have not seen the commercial under discussion, I suspect this is the underlying principle causing the car's apparent uphill movement. I sent no attachments with this message, and I hope this will permit us to prevail against the slings and arrows of outrageous Fortune. Stan Glass <mailto:stanlio at earthlink.net>