Melissa Smith is a reluctant car enthusiast. It appears that she chose to risk her life in order to save her SUV. In reality, she confronted a would-be car thief because she was in a "I'm not dealing with this sort of crap today" attitude. That is the reason Melissa jumped on her vehicle's hood and refused to get off until the carjacker gave up.
The Milwaukee, Wisconsin gas station incident illustrates growing danger at the pump. Below is CNN coverage of the incident.
The carjacker eventually gives up but he still ends up with her purse and cell phone. While Smith is now a news media darling, her actions probably were not the safest course of action. Presumably the video is clear enough that it will wind up in a conviction of at least the accomplice who drove the get-away car.