Well, here's two pages of foster's scribbles I made while bored out of my mind in American History... along with some incredibly insightful scpeculations (does Mac get his head stuck in stuff? Can he even wear a hat? He'd need one the size of a pillowcase) and some comments (ewww! mutant terrence drawings!)...
So i'm not claiming High-quality here. You can comment on deviantart if you want.
Also, part of this: I misdrew Mac today, and then got to thinking... what would Mac look like if he was older? how much do you have to change his proportions to make his head look 'normal'? So I fiddled with that, too.
http://www.deviantart.com/deviation/40406416/
http://www.deviantart.com/deviation/40406520/