A slight head bob. A quick raise of the voice. Coupled with a change in the snap count, they can be effective tools for an offense to use against a defense.
The Steelers are certainly finding that to be the case this season, but it's not the quantity of offsides penalties the offense is drawing that stands out. Rather, it's when those penalties have occurred.
Ben Roethlisberger got the Bengals to jump three times in last Sunday's 29-14 win. But two came in third-and-short situations. Those don't count when the team's third-down conversions are added up, but they keep drives alive, much like defensive holding or pass interference penalties.