BF3 Exiting a vehicle - Stage Left or Stage Right?
You leave a vehicle into the direction you're looking at. So, if you're in a Jeep and look to the right, you will leave the Jeep to the right.
This feature is - at least for me - not that good. If I am the tank-gunner and - of course - the repair guy, I need to watch to the back of our tank to exit safely. Most of the time you will exit facing the enemy because you just hit the Exit button, but you'll get used to it (or die!) :)