NEW YORK (AP) -- Jonah Hill had a unique way of making sure the gun he used in "21 Jump Street" wasn't loaded. Every time the prop guy handed him his gun, he pointed it at the prop guy's crotch and fired. Hill figured the guy would never hand him a loaded gun if he ever wanted to have kids again. Hill never felt comfortable with people firing guns in the movie. He says it was "the scariest, weirdest energy" to bring to the set.