It concerns me as well. My father was an engineer. One day when I was a pimple faced adolescent living at home, he overheard a conversation I was having with one of my buddies where I was telling my friend about going 105 MPH on the freeway in my 1963 Impala. Dad said nothing until the next evening.... he told me he had heard me tell about going that fast in that old car... Dad had plugged data about that car into a computer at his work (IBM), and told me that my car at that speed weighed only 3 pounds on each wheel (net downforce). I never drove it that fast again.