While driving around to get the windshield cannon achievement, I 'accidentally' crashed head on with another car. To my surprise, I wasn't launched from my car but the other driver was launched from her car. Since we were driving identical cars, the only difference I could tell was that the other driver was chubbier than me.
This leads to my question, does putting on weight have any effect on the chance and distance for a windshield cannoneer?