With twelve minutes left in the game between the Minnesota Vikings and the Oakland Raiders, Raiders' wide receiver Darrius Heyward-Bey caught a pass on a crossing route across the middle of the field, and was brought down by Vikings' cornerback Cedric Griffin. At the end of the play, Vikings' linebacker E.J. Henderson came flying into the play and caught Heyward-Bey in the back of his head with either his knee or his thigh.
Though it didn't look like it was terribly serious on the replay, Heyward-Bey remained down on the field and didn't get up. He eventually had the training staff come out and check him out, and the end result was him getting placed on a stretcher and, ultimately, on a cart and taken off of the field.
Heyward-Bey appeared to have movement in his arms and his legs, and gave his teammates a thumbs-up as he was being taken off the field, so hopefully he will recover without any serious issues.