Steelers HC Mike Tomlin needed to be separated from Bengals safety Reggie Nelson after heated exchange

Le'Veon Bell exited Sunday night's game against the Cincinnati Bengals with a hyperextended knee suffered from a low hit from Bengals safety Reggie Nelson. He didn't return, and only finished with 20 yards on eight carries.

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After the game, Steelers head coach Mike Tomlin and Nelson got into it during post-game hand shakes. But there was no love between the two guys. Tomlin and Nelson needed to be separated by Bengals head coach Marvin Lewis.

During his post-game press conference, Tomlin said the exchange wasn't a result of Nelson's hit but rather over a game of he said, she said.

Tomlin is a pretty fiery guy and I could definitely see him throw hands if Lewis didn't step in.

Earlier in the game, Tomlin graced us with this amazing chest-pounding GIF. I think what we learned here is don't mess with Mike Tomlin.

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