This is truly a point of no return. This means every new $1 borrowed reduces GDP. We borrow ourselves into collapse. If we are at that point, the $2T expected deficit in 2009 means we drop GDP by some percent of $2T - if for example we lose $1 of GDP for each $1 of new debt, the deficit itself would cause a $2T in GDP, or a 14% drop, on top of the already declining GDP - collectively a level of destruction not seen since the Great Depression. I guess it is fortunate that the line would not immediately go to a negative $1 of GDP for each new $1 of debt; but as the curent Federal deficit is unprecedented in peacetime, we might find the fall below the trendline to be serious. As usual, Karl Denninger gives an entertaining and informative rant on this topic.
It is also worth noting that PPI was down 3.5% year over year - the largest drop since 1950. Deflation is here. Bernanke has tried to reflate with around $9T of easy credit, but it is like pushing a wet noodle. All around him credit is being destroyed faster than the central bank can reflate. We are living the Austrian School argument, that after a credit bubble bursts, you cannot reflate it. Deflation is inevitable. And so it has arrived.