And surely Zimmerman did not have to get out of his car and follow Trayvon because he thought he looked suspicious. He could have stayed in the car and waited for the police as the operator told him to, he made a concious decision to follow him, like she did to get the gun. Zimmerman would...
Clearly it was bloody dangerous but she was not aiming at anyone, she was not trying to kill and she got 20 years, we don't even give that to convicted murderers in most cases over here.
A form of the same defence was used in both cases, Zimmerman felt his life was in danger and so did Marissa...
I think the point that really stands out is Zimmerman shot someone dead and got nothing, this lady fired warning shots into a WALL and got 20 years! She did not hurt anyone, she certainly did not attempt to get rid of anyone.