The turret provides you with standard cover, which is why only one of the shots went through.  (basically, the entire turret got saturated with laser fire, and one of the shots penetrated the firing slit and punched your arm)  The end result of the attack is that you're critically wounded, unless you successfully dodge.  Dodge reactions are allowable when in a turret, though they mean you'll have to use a half action to move back into position on your next turn, effectively leaving the turret supressed.  (a crew shaken result)<br/><br/>The cover in the turret is good enough to block any hit against you that goes into cover, though high rate auto-weapons like a multilaser are going to tend to sneak through anyway, since your arms are exposed through the firing slit.  The turret is connected to the vehicle, so you can bail from it and return to the limo at any time as a half action or reacion.  You don't need to brace the weapon while in a turret, and you can traverse the weapon 180 degrees, instead of 45 degrees.  You can also overwatch the same 180 degree traverse, and while in a turret, you don't need to have a heavy weapon proficiency to operate the heavy weapon in the turret, just the appropriate drive or pilot skill.