Draw your hand from an unusual view point - straight on. His instructions were to hold your hand 12 inches in front of you - looking more at the hand than at the paper. Pretend you don't know you are looking at a hand but at something new. It is okay to redraw lines because that makes the drawing more interesting. Don't worry if it doesn't look like a hand - it is hard to get it right away.
After I did his exercise I did a whole bunch of other unusual positions
The next one was tough. From my view point, I could only see the tip of my pinky but I still kept drawing it. I knew a pinky is longer so I was drawing what I knew not what I saw.