In one, he would not suffer insult by an expert marksman, who called him a bigamist, a coward, and accused him of not paying a horse bet. Jackson allowed him to fire first, and was shot in the chest, the bullet entering inches from his heart and shattering several ribs. But Jackson refused to go down, standing firm. He held his wound with one hand, took aim, and it's his opponent who bled to death while the bullet in Jackson's chest remained for the rest of his life.
In another, Jackson agreed to be seconds to a duel that ended in humiliation for his opponent with a bullet to the buttocks. That man and his brother were not just upset and offended, but went all around town talking mad shit about him to anyone who would listen. So Jackson found the two men in a saloon in Nashville and beat them with a riding crop, screaming "Defend yourself, you damned rascal!". He was shot from behind in the shoulder, yet continued to whip the man all the same. When I say shot in the shoulder, his blood soaked through two mattresses after the conflict and he nearly died, yet remained conscious enough to prevent the doctors from amputating his arm.
Joe Biden once stood up to "Corn Pop" who was a "really bad dude" at the public pool where Joe was a lifeguard. The pool where his fond memory of children playing with his leg hair supposedly happened.