This particular year and color CF has been known to come with a ghost who is a particular prankster. Annoying. There is a fix. Scare the s**t out of him with a whoopee cushion.
This should fix the problem. One more thing though, the whoopee cushion should be one of the new self inflating ones that omits several loud, long and wet f**ts. Just don't forget to clean your seat afterwards. Good luck.