Peyton Manning says he really DIDN'T want to fire footballs at kids' faces during his famous 2007 "Saturday Night Live" skit -- but changed his mind when a parent begged him to peg his kid.
The sketch is pretty famous -- Peyton was spoofing his United Way ads by teaching kids how to get tattoos, steal cars and play real, hardcore park football.
But, a key part of the skit featured Peyton nailing kids in the face with footballs -- HARD -- and the QB says he was so nervous about tagging the youngsters, he almost quit the bit.
Peyton told the story at the 2018 Indianapolis Colts kickoff lunch on Wednesday -- saying he didn't feel comfortable with the scene at the time and told producers he wanted to shut it down.
But, right before they called it off, one of the parents of the child actors approached Peyton and the director and said, "I want him to hit my kid in the face!"
So, Peyton -- being a people pleaser -- said, "I will do it. I will knock your kid out."
And the rest is history ... hilarious, hilarious history.