For my next trick... I have just completed the next exercise that encouraged us to work in short bursts with a willow charcoal. I didn't have a sheet of A1 paper so I stuck four A3's together...
I definitely think the marks convey the energy and speed of my activity. After I first made marks I returned to the piece in scattered, radom places. I generally worked from left to right. My marks became darker and thicker as I became more confident. I tried to control it as little as possible but I am generally a neat person and I think it remained neat all the way through. I tried to let go - I really did!