a clone drawn by Andy -- both people are identical

an Eskimo drawn by me -- those two things are igloos, and that's the beginning of an Eskimo next to it... they got it before I finished drawing it

Lindburgh drawn by Andy -- that's him crossing the Atlantic ocean.

a shoulder drawn by me -- in between the head and the arm. Pretend it's there.

a zebra drawn by me -- except for that tail hanging in the air, which was drawn by Scott.