Just an error, don't worry. :D

http://www.informationweek.com/news/internet/google/showArticle.jhtml?articleID=210604889

Google Share Plunge To Be Erased By NASDAQ

"The search engine's canceled trades were triggered by erroneous orders that were routed to Nasdaq from another market center, officials said."
By Thomas Claburn
InformationWeek
September 30, 2008 07:15 PM

Google (NSDQ: GOOG) shares appeared to drop to 1 cent per share on Tuesday, an event that prompted Nasdaq officials to begin investigating "potentially erroneous" Google stock transactions, according to Reuters.
Google's share price closed at $320.50 on Tuesday, down more than 15%. The company's after-hours share price had risen to $415 at the time this article was filed, reflecting news of Nasdaq's commitment to address the error with a share price adjustment.