you were dealing with a level one player here (im sure not uncommon for .10/.25 blinds). He simply only knew what he had, which was an overpair. He put no thought into what you had, what anyone else had, or the betting before him. He simply saw he had an overpair, and was ready to put all his money in because your 6 is no good (nevermind that was too far along for him)
PS: Runner runner beats are always fun aren't they
