Bill endorses Obama!?
http://www.youtube.com/watch?v=yZW0m2nWB_M

You probably won't get it if you have not seen the Clinton
http://www.youtube.com/watch?v=M70emIFxETs

and Obama campaign commercial.
http://www.youtube.com/watch?v=TGzdhgZ5k2k

Note that Clinton made the commercial first, and Obama responded the next day.