Jim Harbaugh was walking out of the media interview area in the depths of the Superdome, wearing the 1,000-yard stare of every Super Bowl loser. The 49ers' coach had just mumbled through attempts to explain what had happened, explain why it happened, explain Baltimore 34, San Francisco 31. "Didn't play our best game … Ravens made a lot of plays." It was a lot of that. As he stepped into the hallway, an excited NFL suit came charging toward the entrance. "John Harbaugh is coming," he shouted. "John Harbaugh is coming." This was to alert security that the champ was almost here. Jim looked down the hall for his brother, the Ravens' headman…