John Battelle leaked that Ballmer Throws A Chair At "F*ing Google" by revealing a legal document with the following message.
Prior to joining Google, I set up a meeting on or about November 11, 2004 with Microsoft's CEO Steve Ballmer to discuss my planned departure....At some point in the conversation Mr. Ballmer said: "Just tell me it's not Google." I told him it was Google.At that point, Mr. Ballmer picked up a chair and threw it across the room hitting a table in his office. Mr. Ballmer then said: "Fucking Eric Schmidt is a fucking pussy. I'm going to fucking bury that guy, I have done it before, and I will do it again. I'm going to fucking kill Google." ....
Thereafter, Mr. Ballmer resumed trying to persuade me to stay....Among other things, Mr. Ballmer told me that "Google's not a real company. It's a house of cards."
Danny has a wonderful write up on this at the Search Engine Watch Blog and the forum discussion is taking place at DigitalPoint Forums.