What brave act dose Quinn decide to do? Does it go the way he planned?

Quinn joins the march, wearing a homemade shirt that says “I’M MARCHING” on the front and “ARE YOU?” on the back. Things don't go quite as planned because Guzzo sees his act as one of betrayal (to Paul) and punches him twice after basketball practice. The only thing Guzzo's actions accomplish, however, is to convince Quinn that joining in on the protest is the right thing to do.