Below on the left a couple of heads I sketches during lunch at the Foodhall in Dublin. And on the right the first couple of 1 min poses from the warm up before the long pose. Those couple of sketches are pretty important to get the eye/hand coordination going :P
Since I've been sculpting out that mid section a lot in slower studies, I managed to get it down very quickly here in the image below. Proof that doing the same thing over and over eventually becomes second nature.
In the one below I really don't like the way the head connects to the body, I also made the mistake of drawing a hair going down from the ear...it looks like the edge of the jaw, but it isn't.
Some nice things in the drawing below. Especially like the hair and the hand.
Would've liked another 15 minutes on this one, but unfortunately time ran out.