Humour me for a moment. Go back in your mind to the days of science class when you had to listen to the sounds of a seashell. It had a hollow noise and reminded one of emptiness. That is a comparable feeling when trying to find something the ‘Niners did correctly in 2008. The team took a slight leap on defense by the season’s conclusion; holding opponents to 16 points or fewer in four of the its final five games.