Our local county fair was this weekend as well, I stopped by the tractor pull. There were about 5-6 trucks in that type of category, none of them sang that hard though.
For some reason my girlfriend was really fascinated with it, much more than when we go to the drag track. She said she thinks she could actually do it because she wouldn't be going near as fast. She wants me to build one so she can be the driver. I said howbout you learn to drive a manual and then we can start the discussion.