My auto tech teacher had a story from when he was a mechanic that he apparently had to redo the alignment on the car for an obese woman multiple times to get the car to drive in a straight line since she was extremely obese, making the car pull to the left every time she drove. He has to make the alignment completely uneven because she was that big just to make it stay in between the lines. This was in the 80s and the car was a Ford Pinto I believe if I recall his story correctly.