You know what every first-person shooter needs? I mean, besides guns? Dirt bikes. And every other high-speed vehicle imaginable. Because if shooting a helicopter down with an RPG is fun, it's even more fun when doing so while also riding a dirt bike.
The latest expansion to Battlefield 3, End Game, introduced a few new upgrades. Among them is the dirt bike, which you can access as early as today if you bought the DLC.