It's kind of like this: You're trapped in a cage for so long that you slowly run out of energy to bang on the side of the cage, and try to force your way out. After a period of time, when the energy runs out, the urge to get out is still as strong as it was in the beginning, probably even stronger, but you aren't able to express this urge, as your energy is depleted.

That's where I am now.