Usually when I draw Lockjaw, Marty drawings aren't far behind. And while Marty is usually very happy go lucky and oblivious, he does have a serious side. And even though Marty has a childlike IQ, he still realizes his limits at times and wishes he was smarter. He studies hard, but it can be difficult for him. Marty loves kids and he never gives up on his dream to become a teacher. However Lockjaw can be harsh on the poor guy. In the bottom drawing, he is supposed to be frustrated and puffing out his cheeks while concentrating really hard.