The current margin between Al Franken and Coleman is a mere 477 votes. There are 4,132 precincts across Minnesota. That means that Franken needs only to pick up one single vote every 8.6 precincts in order to claim the lead. Every 8 or 9 precincts, there just has to be one single ballot overlooked, one single ballot that didn't scan right.
This race is far from over. There's a reason the Coleman camp wants to declare victory and get out of there as quickly as possible.