Hacked Chevy SUV Ads
Chevy has created a monster of a website, and has encouraged users to create and submit their own Chevy SUV commercials. You can choose from a number of clips and music, and then add your own text to the video. Although it's likely that Chevy knows and understands that people will create videos that will bash their product, the attention gained is probably worth the risks.
After showing a couple of examples to my roommate Trevor, he went and created his own video, which I've liked to above. There are a number of other great examples, so you can check them out here, here and here. Milk and Cookies also has a couple of clips saved.
If you'd like to create your own clips, check them out at Chevy Apprentice.