I'm also scratching my head about the OP's fence too. Is it electrified as in an electric fence to keep animals in? the electricity MIGHT hurt a person who touched it (while standing on the ground, not while in a car), but wouldn't have any effect on a car touching it.
If a high-voltage electrical power wire has fallen on the fence, that's a dangerous situation. Someone in a car would be safe from getting shocked, but I can see a lots of really big sparks between the fence/car and ground, and a reasonable chance to catch the car on fire. Then, unless the person can drive the car away from the fence and wire and then get out, the person is stuck in a burning car, or will be electrocuted (in the original sense of the word: KILLED by electricity) trying to get out.
Another thing would be driving through a chain link fence. I'm thinking it would have considerable slowing power - you'd have to drive a car pretty fast to get through it, and it would cause considerable damage to the front end, and if the car does get through it, probably break the windshield. If you're going to drive through a fence like that, use a semi truck like Arnold used to drive into the building in Terminator.