maybe the worst part of that had been the way mr slawson , the faculty advisor , had accepted his decision without even trying to change his mind , arnie had given him a lot of guff about how little time he had these days , and how he was simply going to have to cut back on some of his activities , and mr slawson had simply nodded and said , okay , arnie , we 'll be right here in room 30 if you change your mind .