Were sure GM CEO Fritz Hendersons resignation this afternoon would have been a shock to most, and even after the hours that have passed were still left wondering how the shock announcement came about.Someone proclaiming to be the daughter of Henderson, Sarah Henderson, has gone some way as to explain what has happened, on General Motors official Facebook page of all places.Sarah Henderson has posted a colorful rant attacking the chairman of the board of GM, Ed Whitacre, claiming that he was the reason behind Henderson's resignation and is only out to help himself.Stay tuned for an update.Source: Twitpic