I think hand 4 was better for you than him. On that hand he showed you that he thought you were bluffing and you rewarded him for his play, after that you knew it was almost time to tighten up. Hand 5 shows him that you are now going to bluff out even further, coaxing him into keeping his hands longer and paying you off better when you do hit your hand. Unfortunately for him, I don't think he knew who the sucker at the table was, but you pegged him pretty good.