I know I should be working right now. I should be producing a hundred lines per minute by now. I should be able finish at least a page of line drawings right now; but here I am, writing about what I should be doing. When you run a vehicle until it consumes every ounce of fuel, it will stop. When you use something too much, you stretch it to its breaking point. Our bodies are like that. I don't understand. I was fine last week.