From blowout to blackout to shootout, Joe Flacco and the Baltimore Ravens had just enough power to survive one of the most electric Super Bowls ever. The outage flipped the momentum to the 49ers, but the Ravens used a last-gasp defensive stand to hold on to a wild 34-31 victory, leaving the Niners to rue how they let this one get away for the franchise's first loss in six trips to the big game.