Chicago Bears wide receiver Johnny Knox (13) is bent backward as he lies on the ground. (Kiichiro Sato / AP)

Chicago Bears wide receiver Johnny Knox will undergo surgery Monday to stabilize vertebrae in his back.

Knox suffered what the Bears said was a mid-back injury on one of the scariest and most unusual hits imaginable, a hit on which he was nearly doubled over backwards. Knox, who signaled thumbs up as he was carted off early in the game against the Seattle Seahawks at Soldier Field, has feeling in his extremities.

Johnny Knox is carted off the field. (Nam Y. Huh / AP)

Knox was injured trying to recover his fumble after a 17-yard reception; as he lay on the ground, Seattle’s diving defensive end Anthony Hargrove collided with Knox’s upper torso, bending it back. (Video can be seen here; a gif is here.)

“Johnny has total movement thoughout his body,” Coach Lovie Smith said (via the Chicago Tribune). “He has total use of all of his extremities, which is good. He is not paralyzed or anything like that.”

Knox was attended to on the field for about 10 minutes before being carted off and taken to a hospital. Seattle recovered the ball and went on to score on the possession on a Marshawn Lynch touchdown.