Suddenly, from the group of men, the Reverend Casy stepped. He kicked the deputy in the neck and then stood back as the heavy man crumpled into unconsciousness…Casy moved close to Tom. "You got to git out."

– John Steinbeck

The Grapes of Wrath, Chapter 20. The Christ-like figure of Jim Casy is moved to self-sacrifice when he kicks the police deputy unconscious. He does this to save his friend and parolee Tom Joad from arrest and prison.