During the lecture today, our Professor talked about the implementation of nodes as stacks and queues. Looking at the code itself, I thought it is pretty straight forward. But then he threw a curve ball. For excercise we were told to think of special cases. And I was there, frozen, couldn't think of any. Then he gave us some answers on what those special cases are. And there I was, feeling dumb because I failed to think of such simple things.