Dow Jones FALLS as Bailout Passes

Just as the last majority vote was cast to necessitate the passage of the bailout, and as CSPAN anchors were saying the Dow was on the rise, the Dow started (despite the anchor's incorrect and embarassing words) falling!  

And fall it did.

But why?

UPDATE:  

(I learned a new concept!)

Buy the rumor, sell the news (google example)

Concept makes obvious sense just never really gave it much thought before.