Practices haven't gone very well for Sprint Cup drivers today at Darlington.
At least seven drivers have gone to backup cars (Dale Earnhardt Jr., Greg Biffle, Clint Bowyer, Scott Speed, Marcos Ambrose, Casey Mears and Joe Nemechek) and several others have made contact with the wall, including Kyle Busch and Joey Logano.
"She's being tough today, I can tell you that," Biffle said prior to his wreck. "It's very, very challenging. That's what makes it fun, it's a challenging place.
"You're running eight-to-10 inches off the wall and the thing is unforgiving as hell. It'll eat you alive in a second."
AJ Allmendinger was fastest in the first practice session (though Busch and Denny Hamlin were on top for most of it). Jamie McMurray led final practice (Hamlin was second).