So far I haven't had trouble myself, but my Mom came close back in 1980. She was working as the executive secretary for a small-town Chamber of Commerce, and happened to be the last one leaving the building that one evening. Hers was the last car in the parking lot. She was just sitting down in the driver's seat of her car, and was about to swing her legs in, when a man came out of nowhere, yanked the car door out of her hands and tried to climb in with her.
My mom was wearing stilletto heels that day.
She leaned back and gave him both of them.

Heel first.
The description she gave to the police included "I didn't see much of his face, but look for someone running bent over double."
Now, she lives in Arizona, and she keeps a pistol handy. Her experience was one of the (several) reasons why I decided to get my CHL. (plus, recoil is a lot easier on my hands than stilletto heels are on my knees

)