If John had to joust Richard, he would not want to but he would because of his pride, and then he'd lose and insist on doing it again until he hurts too badly and has to leave to have a little frustrated cry. But if they were watching, it'd be less detrimental to their truce I think lol
But picturing Richard hitting the ground all CRUNCH and the horse running over him and his mortal opponent vomiting into his helmet, then Richard bounces back up all Lets do that again! ...John would laugh at that.