Which rule? It seems like they come up with a new rule every day. :-) My hubby and brother called me from the track to ask me what happened. LOL! They said all they could see was a bunch of people running and jumping on each other. I guess Jimmy Spencer got rammed pretty hard and Biffle put Harvick into the wall. I didn't watch the whole thing, just the end. Harvick is okay...but I don't always agree with his attitude. It's not the first time he's been in trouble with other drivers. Oh well. NASCAR will probably fine them and send them to their trailers. ;-)
Biffle rubbed Harvick, who then got into the wall, which (I believe) brought out the red flag. He (KH) then went to Biffle's pit box and told his crew chief that he'd be waiting for Greg when the race was over. NASCAR told Kevin to "go to your trailer and stay there (or words to that effect)", which he, of course didn't do. He jumped the barrier, went over the trunk of Biffle's car, and got up in his face. There will probably be a couple of checks going to NASCAR from Richard Childress & Kevin Harvick.
As for Cousin Jimmy, he was racin' like hell for the lead on the last lap, got down on the apron a couple of times, loaded his tires with crap, and got into another car, which spun into the wall. But like he and James Finch said, "I'd rather (he) race like hell and take 4th than settle for an easy second."
Finch (and I can say this from close experience) treats NASCAR like a golf game or an expensive mistress- something to do with his excess money. But other than that, he's an okay person.