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Tough guys don’t slide, so sometimes tough guys get decked.



San Francisco 49ers quarterback Colin Kaepernick ran for a first down early in Monday night’s contest against the Minnesota Vikings, but a freight train was waiting for him right beyond that yellow line.



It was called the Harrison Smith Express:



The Minnesota safety lowered his shoulder and absolutely smashed Kaepernick, putting No. 7 on his back in a hurry.



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