Bobby seems to be acting awfully high handed in his first scene with JR. He tells JR that he's marrying Pam again and the first time JR steps out of line, Sue Ellen will be a very attractive widow. There's no way around this; it's a death threat to his own brother! Besides that, Bobby is talking as if he has more experience in Ewing Oil than JR does. Jock and Miss Ellie apparently never taught Bobby to respect his elders, and that making death threats to family members is just something you don't do. Bobby even tries to rationalize his divorce from Pam as happening because of "too much interference from family members." I remember it as Pam leaving because she couldn't stand the type of man Bobby had become and blaming him for her mother's plane crash. She said he wasn't the same man she married. Frankly I never saw Bobby act any differently when he was supposed to be the ""good" Bobby or the "bad" Bobby. He acted pretty much the same, disrespecting his elders, assaulting JR whenever he felt like it, threatening people with physical violence to get his way, and for some reason never doing any of that to Cliff despite Cliff actually trying to break up Bobby and Pam. That would have been too enjoyable to watch I guess.