I just can't resist posting this old clip. The effect at the end of the video is not just convincing but rather spooky.
The Ghost Car - The most amazing home videos are here
If you check the video again you'll see the fence is actually rather messed up suggesting he did hit it, and managed to slip underneath with the fence springing back into place before the cop pulls up in front of it. No ghost here, just a criminal getting a lucky break!
But still... it's a rather awesome chance happening.