I almost never watch the Nationwide series, but I was flipping channels and watched the last 8 laps or so live.
Part of the problem was that they had a wreck with 4 laps left, setting up a green-white-checker finish. That bunched up about 20 cars for the last 2 laps. Coming into the final turn, Brad Keselowski was right behind Regan Smith, and when he tried to pull out to get around him, Smith made a blocking move, and when Keselowski's car hit the corner of Smith's, they both wrecked and everybody behind them was way too tight to have much reaction time.
It looked like one tire from the #32 car went high over the fence - I didn't see it until ESPN showed some replays at least an hour after the race. I think they were waiting to show some replays of the #32 car hitting the fence because they were afraid they'd show video that could have included a fatality in the grandstand.
Oddly enough, the #32 car crossed the finish line in 13th place without an engine or either front tire. That was a new one on me. The second and third place finishers were also spinning out as they crossed the finish line.