It will likely go down in history as the most freakish, nightmarish accident in drag-racing history. One top drag-racing official with 40 years' experience told the media he'd never seen or heard of anything like it. On the first Saturday in April, Michelle "Shelly" Howard, a 59-year-old registered nurse and mother of three who had been drag-racing for 27 years, took her Top Alcohol Dragster for a 10 p.m. practice run at Tulsa Raceway Park as part of a late-night event. Howard, the wife of a Tulsa physician, had huge experience—she'd won the Division 4 title twice and was a...