I noticed Season 1 was mainly about the cars themselves, Season 2 got a bit more "dramatic" and Season 3 has gotten even worse. If they do it again next year, it wouldn't surprise me if they make pigs fly and hell freeze over.
I see Wu is up to his old tricks as usual. If you've watched the TV show about the real Bullrun rally (show is called Bullrun: Cops, Cars & Superstars), Wu was using a Hummer and he had a smoke screen installed in it and during the beginning of one of the legs, he smoked everyone out. I believe that was the 2008 running of the real Bullrun. However, I'm a huge Bullrun fan so I'll be watching.