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DARLINGTON, S.C. (AP) -- Kyle Busch and Kevin Harvick have once again focused the NASCAR spotlight on who's fighting instead of who's winning.

One race after Juan Pablo Montoya and Ryan Newman traded wrecks and words at Richmond, Harvick squared off with Busch following a late crash that took both from contention at Darlington Raceway's Southern 500 on Saturday night.

Busch slowly followed Harvick into the pit area when the race was done, Harvick eventually jumping out of his car and attempting to punch or grab his rival through his window. Busch then slammed into Harvick's driverless car to clear space and drive off.

It was an ugly way to end Regan Smith's first Sprint Cup win in 105 career races. But it's a spat sure to keep fans and drivers buzzing all week long.

Dale Earnhardt Jr. said he couldn't wait to get "on the Internet tonight and check it out. I don't know what happened."

(Copyright ©2011 by The Associated Press. All Rights Reserved.)