Crashes happen everyday but its sad to see an exotic crash and get wrecked. You may have seen many cars catch fire while they are being driven. The cause of the fire is some mechanical defect or even a short circuit due to faulty electricals.
Here in this video, you can see a badly wrecked Porsche 911. Someone tries to crank up the car to life to check if its still working even after the accident. As you can see the car has been wrecked quite badly and starts after cranking for a few seconds. After starting, immediately the engine catches fire.