Shouting

Jerry tried to think of worse things to shout in a movie theater than “Fire!” He ran down the list in his notebook, shouting each one.
The theater owner didn’t appreciate his field research and banned him from the theater.
Never one to give up easily, he tried other theaters, but his face was on a printout at the box office.
So he went from town to town, but the theater chains caught on to his act.
Jerry became a master of disguise, using false noses and wigs and sunglasses to alter his appearance.
Eventually, the worst word became “JERRY!”