So, if you see a truck downtown with a giant cartoon head playing on the side of it...

...the explanation is here:

Cartoon of former Google CEO Schmidt's 'creepy' lines hits D.C. streets
-- David Sarno
Los Angeles Times Technology blog January 26, 2011
http://latimesblogs.latimes.com/technology/2011/01/animation-of-google-ex-ceo-schmidts-creepy-lines-hits-dc-streets.html