 When Richard Norton (as "Long Legs", not Kyo) is kicked in the Groin  by Chuck Norris, he grabs himself and yelps out "Oh shit... shit!".  Norton himself said that when he was assisting with the stunts on  the set of "The Blues Brothers" and told John Belushi the fight hed  be in, Belushi was the one who told him to say "Oh shit!" when  getting kicked in the groin.