A maneuver that hides a public boner quite effectively. How it is done is to go either side of your crotch with your hand and "swipe" your hand to the opposite side of your crotch and hit your boner. This will cause the boner to go at a vertical position. The key is to have your pants catch your boner at the vertical position.
This technique works pretty much flawlessly when mastered. An expert can even hide a boner without a shirt by using boxers to catch the boner. Trick is to have the underwear go lower than your pants and wear the pants at a good height to cover the vertical boner. You still won't be able to hide the bulge created, but that is awesome to have.
WARNING: Raging public boners still go slightly outward and may still be visible if the force of the restraint is not strong enough to keep the boner back.
Jesse: "That chick was amazing! How did you not get a boner from that?"
Jon: "You kidding me? Of course I had a boner, but I effectively sideswiped it away like magic."
Jesse: "You are a fucking boss."