 In the episode , Ralph Wiggum coins the phrase , " Oh boy , sleep ! That 's where I 'm a Viking ! " The term caused a point of contention with some fans curious whether or not he meant he was literally a Viking in his dreams or if he meant sleeping was just something he excelled at . Mirkin confirmed on Twitter that the line was meant to be taken literally , stating " We weren 't writing Ralph as capable of metaphor . " 
