Panthers tight end Greg Olsen was knocked out cold by a vicious helmet-to-helmet hit by Redskins linebacker Ryan Anderson.

Olsen made a catch and was attempting to run through a couple of Redskins defenders when he took a huge shot to the head.

The Panthers tight end was able to get up quickly following the hit and was taken to the locker room to be evaluated.  Anderson was ejected for the hit.

Flip the Page to see the vicious hit: